Elvis C. S. Chen

Elvis C. S. Chen

Imaging Scientist @ Robarts Research Institute

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A list of all the posts and pages found on the site. For you robots out there is an XML version available for digesting as well.

Pages

Matlab

Published:

Posts

New Affiliation

less than 1 minute read

Published:

As of today, my primary affiliation is with the Department of Electrical and Computer Engineering at Western University. Looking forward to meet with new colleagues and collabortors!

Publication in IJCARS

less than 1 minute read

Published:

Congradulations to Wenyao for his publication in the International Journal of Computer Assisted Radiology and Surgery (IJCARS). The paper itself will be presented in the Information Processing on Computer Assisted Interventions (IPCAI) in June 2023, Munich, Germany:

Publication in IJCARS

less than 1 minute read

Published:

Congradulations to Shuwei for his publication in the International Journal of Computer Assisted Radiology and Surgery (IJCARS). The paper itself will be presented in the Information Processing on Computer Assisted Interventions (IPCAI) in June 2023, Munich, Germany:

Publication in IEEE MetroXRAINE

less than 1 minute read

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A conference paper presented in the 2022 IEEE International Conference on Metrology for Extended Reality, Artificial Intelligence and Neural Engineering (MetroXRAINE, Rome, Italy) has finally came on-line:

Guest Editors Forward, AE-CAI

less than 1 minute read

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The editorial for the Augmented Environments for Computer-Assisted Interventions (AE-CAI) was published online since last year, but the bibliography was finally completed this month.

Congradulations on another successful MICCAI submission!

less than 1 minute read

Published:

A second paper accepted by MICCAI is titled :

Quantitative Assessments for Ultrasound Probe Calibration

This work will be presented at The 24th International Conference on Medical Image Computing & Computer Assisted Intervention (MICCAI 2021) in September, 2021.

Details can be found here.

Congradulations to Patrick Carnahan on the successful MICCAI submission!

less than 1 minute read

Published:

Congrtulations are in order to Patrick for the acceptance of the manuscript titled:

DeepMV: Fully Automatic Ultrasound Segmentation for Patient Specific Mitral Valve Modelling

by the Medical Image Computing and Computer Assisted Intervention (MICCAI) conference. This work will be presented at The 24th International Conference on Medical Image Computing & Computer Assisted Intervention (MICCAI 2021) in September, 2021.

Details can be found here.

ps. the title of this manuscript may be changed based on reviewers’ suggestion.

portfolio

publications

A strain-energy model of passive knee kinematics for the study of surgical implantation strategies

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2000

In this MICCAI paper, we presented a foward-kinematics model based on virtual ligament for passive knee kinematics.

Recommended citation: Chen ECS, Ellis R, Bryant TJ, (2000). "A strain-energy model of passive knee kinematics for the study of surgical implantation strategies"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2000, LNCS 1935, pp. 1086-1095. https://doi.org/10.1007/978-3-540-40899-4_113

Ligament strains predict knee motion after total joint replacement

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2005

In this MICCAI paper, we presented a passive forward kinematics knee model to predict knee motion of a total joint replacement.

Recommended citation: Chen ECS, Lanovaz JL, Ellis R, (2005). "Ligament strains predict knee motion after total joint replacement"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2005, LNCS 3749, pp. 770-777. https://doi.org/10.1007/11566465_95

An inverse kinematics model for post-operative knee

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2006

In this MICCAI paper, we presented an inverse kinematics model for knees after total knee arthroplasty.

Recommended citation: Chen ECS, Ellis RE, (2006). "An inverse kinematics model for post-operative knee"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2006, LNCS 4190, pp. 313-320. https://doi.org/10.1007/11866565_39

Using registration uncertainty visualization in a user study of a simple surgical task

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2006

In this MICCAI paper, we presented a novel method to visualize registration uncertainty and a simple study to motivate the use of uncertainty visualization in computer-assisted surgery.

Recommended citation: Simpson AL, Ma B, Chen ECS, Ellis RE, Stewart AJ, (2006). "Using registration uncertainty visualization in a user study of a simple surgical task"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2006, LNCS 4191, pp. 397-404. https://doi.org/10.1007/11866763_49

Computation and Validation of Intra- operative Camera Uncertainty

Published in 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS), 2007

In this conference paper, we presented a simple method for computing uncertainty in an optical tracking system in this peer-reviewed conference paper.

Recommended citation: Simpson AL, Ma B, Chen ECS, Ellis RE, Stewart A, (2007). "Computation and Validation of Intra- operative Camera Uncertainty"; in 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, pp. 479-482. https://doi.org/10.1109/IEMBS.2007.4352327

A fast contact-determination algorithm for in vivo knee kinematics analysis

Published in Orthopaedic Proceedings, 2008

In this conference paper, we presented a near real-time algorithm for collision detection betweeen two surfaces and applied it to analyze joint kinematics.

Recommended citation: Chen ECS, Lanovaz JL, Ellis RE, (2008). "A fast contact-determination algorithm for in vivo knee kinematics analysis"; in Orthopaedic Proceedings, 90-B(Supp_I), pp. 97. https://online.boneandjoint.org.uk/doi/abs/10.1302/0301-620X.90BSUPP_I.0880097b

Biomechanically constrained groupwise US to CT registration of the lumbar spine

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2009

In this MICCAI paper, we presented a novel method to register 3D ultrasound volume to CT where spine curvatures imaged in these two modalities are different.

Recommended citation: Gill S, Mousavi P, Fichtinger G, Chen ECS, Boisvert J, Pichora D, Abolmaesumi P, (2009). "Biomechanically constrained groupwise US to CT registration of the lumbar spine"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2009, LNCS 5761, pp. 803-810. https://doi.org/10.1007/978-3-642-04268-3_99

A Prospective Randomized Assessment of a Spatial Orientation Device in Natural Orifice Translumenal Endoscopic Surgery (NOTES)

Published in American Journal of Gastroenterology, 2009

In this clinical abstract, we presented a method to present the shape of an endoscope using a magnetic orientation device and assessed the feasibility of this device in a pig model.

Recommended citation: Fowler S, Chen ECS, Hefny M, Ellis RE, Mercer D, Jalink D, Samis A, Hookey L, (2009). "A Prospective Randomized Assessment of a Spatial Orientation Device in Natural Orifice Translumenal Endoscopic Surgery (NOTES)"; in American Journal of Gastroenterology, 104, pp. S534. https://journals.lww.com/ajg/Fulltext/2009/10003/A_Prospective_Randomized_Assessment_of_a_Spatial.1420.aspx

Representing flexible endoscope shapes with hermite splines

Published in SPIE Medical Imaging, 2010

In this peer-reviewed conference paper, we developed a Hermite splines formulation to represent the shape of a flexible endoscope, by taking advantage of the orientation tracking of the magnetic sensors.

Recommended citation: Chen ECS, Fowler SA, Hookey LC, Ellis RE, (2010). "Representing flexible endoscope shapes with hermite splines"; Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling. 76251D. pp. 421-427. https://doi.org/10.1117/12.844234

Ultrasound guided spine needle insertion

Published in SPIE Medical Imaging, 2010

This peer-reviewed conference paper described the development of a surgical navigation system for spine needle interventions.

Recommended citation: Chen ECS, Mousavi P, Gill S, Fichtinger G, Abolmaesumi P, (2010). "Ultrasound guided spine needle insertion"; Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling. 7625. pp. 1028-1035. https://doi.org/10.1117/12.843716

Predicting Target Vessel Location for Improved Planning of Robot-Assisted CABG Procedures

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2010

In this MICCAI paper, we proposed a technique to predict the position of the peri-operative target vessel location with ~3.5mm RMS accuracy.

Recommended citation: Cho DS, Linte CA, Chen ECS, Wedlake C, Moore J, Barron J, Patel R, Peters TM, (2010). "Predicting Target Vessel Location for Improved Planning of Robot-Assisted CABG Procedures"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2010, LNCS 6363, pp. 205-212. https://doi.org/10.1007/978-3-642-15711-0_26

A prospective, randomized assessment of a spatial orientation device in natural orifice transluminal endoscopic surgery

Published in Gastrointestinal Endoscopy, 2011

In this journal paper, I integrated a magnetic tracking device into an endoscope so its shape can be determined in realtime. I showed that by visualizing the orientation and shape of the endoscopy, the insertion of the endoscope is greatly facilitated.

Recommended citation: Fowler S, Hefny MS, Chen ECS, Ellis RE, Mercer D, Jalink D, Samis A, Hookey LC, (2011). "A prospective, randomized assessment of a spatial orientation device in natural orifice transluminal endoscopic surgery"; in Gastrointestinal Endoscopy, 73(1), pp. 123-127. https://doi.org/10.1016/j.gie.2010.09.013

A unified framework for voxel classification and triangulation

Published in SPIE Medical Imaging, 2011

In this peer-reviewed conference paper, we presented a unified framework for voxel classification and triangulation for medical images.

Recommended citation: Baxter JS, Peters TM, Chen ECS, (2011). "A unified framework for voxel classification and triangulation"; in SPIE Medical Imaging: Visualization, Image-Guided Procedures, and Modeling, 796436, pp. 933-940. https://doi.org/10.1117/12.877715

GPU accelerated registration of a statistical shape model of the lumbar spine to 3D ultrasound images

Published in SPIE Medical Imaging, 2011

In this peer-reviewed conference paper, we presented a parallel implementation of a statistical shape model registration to 3D ultrasound images of the lumbar vertebrae.

Recommended citation: Khallaghi S, Abolmaesumi P, Gong R, Chen ECS, Gill S, Boisvert J, Pichora D, Borschneck D, Fichtinger G, Mousavi P, (2011). "GPU accelerated registration of a statistical shape model of the lumbar spine to 3D ultrasound images"; SPIE Medical Imaging: Visualization, Image-Guided Procedures, and Modeling, 79642W, pp. 871-878. https://doi.org/10.1117/12.878377

Feature-based US to CT registration of the aortic root

Published in SPIE Medical Imaging, 2011

In this peer-reviewed conference paper, we introduced a feature-based registration to align biplane ultrasound images of the aortic root with a preoperative CT volume.

Recommended citation: Lang P, Chen ECS, Guiraudon GM, Jones DL, Bainbridge D, Chu MW, Drangova M, Hata N, Jain A, Peters TM, (2011). "Feature-based US to CT registration of the aortic root"; in SPIE Medical Imaging: Visualization, Image-Guided Procedures, and Modeling, 79641G, pp. 442-450. https://doi.org/10.1117/12.878386

Integrated CT and Echocardiography for Intraprocedural Transcatheter Aortic Valve Implantation

Published in Journal of the American Society of Echocardiography, 2011

In this conference paper, a registration between tracked intraoperative ultrasound to preoperative CT is presented in the context of transcatheter aortic valve implantation. This work was initially presented at the American Society of Echocardiography 22nd Annual Meeting in Montreal.

Recommended citation: Lang P, Chu MW, Bainbridge D, Chen ECS, Peters TM, (2011). "Integrated CT and Echocardiography for Intraprocedural Transcatheter Aortic Valve Implantation"; in Journal of the American Society of Echocardiography, 24(5), pp. B44. http://linkinghub.elsevier.com/retrieve/pii/S089473171100188X

Preliminary assessment of a renal tumor materials model

Published in Journal of Endourology, 2011

In this journal paper, we evaluated a materials model for laparoscopic guided cryotherapy or radiofrequency tissue ablation (RFA) of kidney tumors through expert surgeon assessment.

Recommended citation: Fernandez A, Chen ECS, Moore J, Peters TM, Cheung C, Erdeljan P, Fuller A, Pautler SE, McDougall EM, (2011). "Preliminary assessment of a renal tumor materials model"; in Journal of Endourology, 25(8), pp. 1371-1375. https://doi.org/10.1089/end.2011.0050

Investigating perioperative heart migration during Robot-Assisted Coronary Artery Bypass Grafting interventions

Published in Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery, 2011

In this journal peper, we presented a method to estimate the perioperative heart migration in the context of robot-assisted coronary artery bypass grafting (CABG) surgery.

Recommended citation: Linte CA, Cho DS, Wedlake C, Moore J, Chen ECS, Bainbridge D, Patel R, Peters T, Kiaii BB, (2011). "Investigating perioperative heart migration during Robot-Assisted Coronary Artery Bypass Grafting interventions"; in Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery, 6(5), pp. 323-330. https://doi.org/10.1097/imi.0b013e3182374e7e

CT-US Registration for Guidance of Transcatheter Aortic Valve Implantation

Published in Augmented Environments for Computer Assisted Interventions (AE-CAI), 2011

In this peer-reviewed conference paper, I presented a method to register intraoperative tracked ultrasound to preoperative CT surfaces using robust-ICP in the context of aortic valve surgery.

Recommended citation: Lang P, Chu MW, Bainbridge D, Chen ECS, Peters TM, (2011). "CT-US Registration for Guidance of Transcatheter Aortic Valve Implantation"; in Augmented Environments for Computer Assisted Interventions (AE-CAI), LNCS 7264, pp. 85-92. https://doi.org/10.1007/978-3-642-32630-1_9

First Prize: A phantom model as a teaching modality for laparoscopic partial nephrectomy

Published in Journal of Endourology, 2012

In this journal paper, we evaluated a materials model for laparoscopic ultrasound identification and partial nephrectomy of kidney tumors. This work was awarded the First Price in the 2011 Endourological Society Essay Competition.

Recommended citation: Fernandez A, Chen ECS, Moore J, Cheung C, Erdeljan P, Fuller A, McDougall EM, Peters TM, Pautler SE, (2012). "First Prize: A phantom model as a teaching modality for laparoscopic partial nephrectomy"; in Journal of Endourology, 26(1), pp. 1-5. http://doi.org/10.1089/end.2011.0131

An augmented reality platform for planning of minimally invasive cardiac surgeries

Published in SPIE Medical Imaging, 2012

This peer-reviewed conference paper described a hand-eye calibration method for AR glass and the integration of this visualization modality into an image-guided cardiac surgery workflow.

Recommended citation: Chen ECS, Sarkar K, Baxter JS, Moore J, Wedlake C, Peters TM, (2012). "An augmented reality platform for planning of minimally invasive cardiac surgeries"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 831617, pp. 375-384. https://doi.org/10.1117/12.911998

Intra-operative prostate motion tracking using surface markers for robot-assisted laparoscopic radical prostatectomy

Published in SPIE Medical Imaging, 2012

This peer-reviewed conference paper described the tracking of prostate using surface markers for robot-assisted laparoscopic radical prostatectomy.

Recommended citation: Esteghamatian M, Sarkar K, Pautler SE, Chen ECS, Peters TM, (2012). "Intra-operative prostate motion tracking using surface markers for robot-assisted laparoscopic radical prostatectomy"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 83162N, pp. 795-802. https://doi.org/10.1117/12.911151

Towards real-time 3D US-CT registration on the beating heart for guidance of minimally invasive cardiac interventions

Published in SPIE Medical Imaging, 2012

In this peer-reviewed conference paper, we proposed a new means of guidance for minimally invasive cardiac interventions using 3D real-time ultrasound images to show the intra-operative heart motion together with preoperative CT image(s) employed to demonstrate high-quality 3D anatomical context.

Recommended citation: Li F, Lang P, Rajchl M, Chen ECS, Guiraudon G, Peters TM, (2012). "Towards real-time 3D US-CT registration on the beating heart for guidance of minimally invasive cardiac interventions"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 831615, pp. 360--367. https://doi.org/10.1117/12.911605

Predicting target vessel location on robot‐assisted coronary artery bypass graft using CT to ultrasound registration

Published in Medical Physics, 2012

In this journal paper, we presented a method to predict vessel location based on CT to ultrasound registration in the context of robot-assisted coronary artery bypass grafting (RA-CABG) procedure.

Recommended citation: Cho DS, Linte C, Chen ECS, Bainbridge D, Wedlake C, Moore J, Barron J, Patel R, Peters T, (2012). "Predicting target vessel location on robot‐assisted coronary artery bypass graft using CT to ultrasound registration"; in Medical Physics, 39(3), pp. 1579-1587. https://doi.org/10.1118/1.3684958

Use of a Mixed-Reality system to improve the planning of brain tumour resections: preliminary results

Published in Augmented Environments for Computer Assisted Interventions (AE-CAI), 2012

This peer-reviewed conference paper described the development and evaluation of an Augmented Reality (AR) system geared towards planning brain tumour resection interventions.

Recommended citation: Abhari K, Baxter JS, Chen ECS, Khan AR, Wedlake C, Peters TM, de Ribaupierre S, Eagleson R, (2013). "Use of a Mixed-Reality system to improve the planning of brain tumour resections: preliminary results"; in Augmented Environments for Computer Assisted Interventions (AE-CAI), LNCS 7815, pp. 55-66. https://doi.org/10.1007/978-3-642-38085-3_7

Augmented Environments for Computer-Assisted Interventions

Published in Augmented Environments for Computer-Assisted Interventions, 2012

In this conference proceeding, 16 revised full papers were presented at the AE-CAI international workshop. I served as the Program Chair and Proceeding Editor for AE-CAI 2012.

Recommended citation: Linte CA, Chen ECS, Berger M, Moore JT, Holmes DR. (Eds) in Augmented Environments for Computer-Assisted Interventions, LNCS 7815. https://doi.org/10.1007/978-3-642-38085-3

The role of augmented reality in training the planning of brain tumor resection

Published in Medical Imaging and Augmented Reality (MIAR), 2013

In this peer-reviewed conference paper, we evaluated the performance of different groups of users in 4 different visualization modalities in the context of training the planning of brain tumor resection.

Recommended citation: Abhari K, Baxter JS, Chen ECS, Khan AR, Wedlake C, Peters TM, Eagleson R, de Ribaupierre S, (2013). "The role of augmented reality in training the planning of brain tumor resection"; in Augmented Reality Environments for Medical Imaging and Computer-Assisted Interventions -- MIAR/AE-CAI 2013, LNCS 8090, pp. 241-248. https://doi.org/10.1007/978-3-642-40843-4_26

Robust intraoperative US probe tracking using a monocular endoscopic camera

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2013

In this MICCAI paper, we presented a vision-based method to track the ultrasound probe using a standard monocular video laparoscopic instrument.

Recommended citation: Jayarathne UL, McLeod AJ, Peters TM, Chen ECS, (2013). "Robust intraoperative US probe tracking using a monocular endoscopic camera"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2013, LNCS 8151, pp. 363-370. https://doi.org/10.1007/978-3-642-40760-4_46

Navigated simulator for spinal needle interventions

Published in Medicine Meets Virtual Reality (MMVR21), 2014

In this journal paper, we presented a navigated simulator for ultrasound-guided spine needle interventions, comprising of an ultrasound scanner, tracking system, surgical instruments, tissue-mimicking spine phantom, and augmented virtuality navigation platform. This work was initally presented at MMVR-21.

Recommended citation: Chen ECS, Ameri G, Li H, Sondekoppam RV, Ganapathy S, Peters TM, (2014). "Navigated simulator for spinal needle interventions"; in Studies in Health Technology and Informatics, 196(MMVR-21), pp. 56-60. http://www.ncbi.nlm.nih.gov/pubmed/24732480

Synthetic aperture imaging in ultrasound calibration

Published in SPIE Medical Imaging, 2014

This peer-reviewed conference paper presents a novel ultrasound calibration procedure that takes advantage of synthetic aperture imaging to reconstruct high resolution ultrasound images at arbitrary depths.

Recommended citation: Ameri G, Baxter JS, McLeod A, Jayaranthe UL, Chen ECS, Peters TM, (2014). "Synthetic aperture imaging in ultrasound calibration"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 90361I, pp. 401-406. https://doi.org/10.1117/12.2043899

Solving for free-hand and real-time 3D ultrasound calibration with anisotropic orthogonal Procrustes analysis

Published in SPIE Medical Imaging, 2014

In this peer-reviewed conference paper, we introduced a novel concept of plane-based phantom for free-hand ultrasound calibration. Mathematically, we introduced an iterative solution for solving fiducial-based registration with anisotropic scaling.

Recommended citation: Chen ECS, McLeod A, Jayarathne UL, Peters TM, (2014). "Solving for free-hand and real-time 3D ultrasound calibration with anisotropic orthogonal Procrustes analysis"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 90361Z, pp. 524-530. https://doi.org/10.1117/12.2043080

Feasibility of real-time workflow segmentation for tracked needle interventions

Published in IEEE Transactions on Biomedical Engineering (IEEE-TBME), 2014

In this journal paper, we developed a workflow segmentation algorithm for needle interventions using needle spatial tracking data.

Recommended citation: Holden MS, Ungi T, Sargent D, McGraw RC, Chen ECS, Ganapathy S, Peters TM, Fichtinger G, (2014). "Feasibility of real-time workflow segmentation for tracked needle interventions"; in IEEE Transactions on Biomedical Engineering, 61(6), pp. 1720-1728. https://ieeexplore.ieee.org/abstract/document/6716990

Training for planning tumour resection: augmented reality and human factors

Published in IEEE Transactions on Biomedical Engineering (IEEE-TBME), 2014

In this journal paper, we introduced a mixed-reality system to facilitate training for planning a common neurosurgical procedure, brain tumour resection.

Recommended citation: Abhari K, Baxter JS, Chen ECS, Khan AR, Peters TM, de Ribaupierre S, Eagleson R, (2015). "Training for planning tumour resection: augmented reality and human factors"; in IEEE Transactions on Biomedical Engineering, 62(6), pp. 1466-1477. https://ieeexplore.ieee.org/abstract/document/6998039

Line fiducial material and thickness considerations for ultrasound calibration

Published in SPIE Medical Imaging, 2015

In the context of ultrasound probe calibration, an evaluation of a variety of calibration phantoms with different geometrical and material properties for the phantomless calibration procedure was performed in this peer-reviewed conference paper.

Recommended citation: Ameri G, McLeod A, Baxter JS, Chen ECS, Peters TM, (2015). "Line fiducial material and thickness considerations for ultrasound calibration"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 941529, pp. 559-567. https://doi.org/10.1117/12.2081294

Acoustic characterization of polyvinyl chloride and self-healing silicone as phantom materials

Published in SPIE Medical Imaging, 2015

In this peer-reviewed conference paper, we investigated the acoustic properties of soft polyvinyl chloride (PVC) and self-healing silicone in the context of soft-tissue mimicking materials.

Recommended citation: Ceh D, Peters TM, Chen ECS, (2015). "Acoustic characterization of polyvinyl chloride and self-healing silicone as phantom materials"; in SPIE Medical Imaging: Physics of Medical Imaging, 94123G, pp. 861-868. https://doi.org/10.1117/12.2081449

Registration of 3D shapes under anisotropic scaling

Published in International Journal of Computer Assisted Radiology and Surgery, 2015

In this journal paper, we introduced an Iterative Clostst-Point (ICP) algorithm for solving point-set registration with anisotropic scales. This work was presented at IPCAI 2015.

Recommended citation: Chen ECS, McLeod AJ, Baxter JS, Peters TM, (2015). "Registration of 3D shapes under anisotropic scaling"; in International Journal of Computer Assisted Radiology and Surgery, 10(6), pp. 867-878. https://doi.org/10.1007/s11548-015-1199-9

Optimization-based interactive segmentation interface for multi-region problems

Published in SPIE Medical Imaging, 2015

In this peer-reviewed conference paper, we introduced a novel concept of interactive segmentation supported by Hierarchical max-flow algorithm.

Recommended citation: Baxter JS, Rajchl M, Peters TM, Chen ECS, (2015). "Optimization-based interactive segmentation interface for multi-region problems"; in SPIE Medical Imaging: Image Processing, 94133T, pp. 1014-1021. https://doi.org/10.1117/12.2081388

Detection and visualization of dural pulsation for spine needle interventions

Published in International Journal of Computer Assisted Radiology and Surgery, 2015

In this journal paper, a motion magnification technique was developed and applied to ultrasound to detect minute dural pulsation in the context of spine needle intervention. This work was initially presented at IPCAI 2015.

Recommended citation: McLeod AJ, Baxter JS, Ameri G, Ganapathy S, Peters TM, Chen ECS, (2015). "Detection and visualization of dural pulsation for spine needle interventions"; in International Journal of Computer Assisted Radiology and Surgery, 10(6), pp. 947-958. https://doi.org/10.1007/s11548-015-1192-3

Augmented Reality Ultrasound Guidance for Central Line Procedures: Preliminary Results

Published in Augmented Environments for Computer Assisted Interventions (AE-CAI), 2015

This peer-reviewed conference paper presented preliminary results on an augmented reality (AR) needle guidance system in which a tracked needle and ultrasound fan are simultaneously visualized in their entirety.

Recommended citation: Ameri G, Baxter JS, McLeod A, Peters TM, Chen ECS, (2015). "Augmented Reality Ultrasound Guidance for Central Line Procedures: Preliminary Results"; in Augmented Environments for Computer Assisted Interventions (AE-CAI), LNCS 9365, pp. 11-20. https://doi.org/10.1007/978-3-319-24601-7_2

An Iterative Closest Point Framework for Ultrasound Calibration

Published in Augmented Environments for Computer Assisted Interventions (AE-CAI), 2015

In this peer-reviewed conference paper, we introduced the concept of point-to-line registration to achieve fast and accurate ultrasound probe calibration.

Recommended citation: Chen ECS, McLeod A, Baxter JS, Peters TM, (2015). "An Iterative Closest Point Framework for Ultrasound Calibration"; in Augmented Environments for Computer Assisted Interventions (AE-CAI), LNCS 9365, pp. 69-79. https://doi.org/10.1007/978-3-319-24601-7_8

Simultaneous estimation of feature correspondence and stereo object pose with application to ultrasound augmented robotic laparoscopy

Published in Augmented Environments for Computer Assisted Interventions (AE-CAI), 2015

In this peer-reviewed conference paper, we extended a state-of-the-art simultaneous monocular pose and correspondence estimation framework to a stereo imaging model.

Recommended citation: Jayarathne UL, Luo X, Chen ECS, Peters TM, (2015). "Simultaneous estimation of feature correspondence and stereo object pose with application to ultrasound augmented robotic laparoscopy"; in Augmented Environments for Computer Assisted Interventions (AE-CAI), LNCS 9365, pp. 133-144. https://doi.org/10.1007/978-3-319-24601-7_14

Image-Guided Procedures: Tools, Techniques, and Clinical Applications

Published in Mixed and Augmented Reality in Medicine (Book), 2016

In this book chapter, we provided an overview of image-guided surgical techniques and provides as examples some of the systems in which the authors have experience.

Recommended citation: inte CA, Moore JT, Chen ECS, Peters TM, (2016). "Image-Guided Procedures: Tools, Techniques, and Clinical Applications"; in W.A. Farhat and J. Drake (Eds.) Bioengineering for Surgery, Chap. 4, pp. 59-90. https://doi.org/10.1016/B978-0-08-100123-3.00004-X

Freehand 3D-US reconstruction with robust visual tracking with application to ultrasound-augmented laparoscopy

Published in SPIE Medical Imaging, 2016

In this peer-reviewed conference paper, we demonstrate that a recently proposed image-based, robust pose tracking method can be used to achieve high quality reconstructions.

Recommended citation: Jayarathne UL, Chen ECS, Moore J, Peters TM, (2016). "Freehand 3D-US reconstruction with robust visual tracking with application to ultrasound-augmented laparoscopy"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 978617, pp. 380-385. https://doi.org/10.1117/12.2214338

Estimation of line-based target registration error

Published in SPIE Medical Imaging, 2016

In this peer-reviewed conference paper, we present a novel method for estimating target registration error (TRE) in point-to-line registration.

Recommended citation: Ma B, Peters TM, Chen ECS, (2016). "Estimation of line-based target registration error"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 978626, pp. 654-662. https://doi.org/10.1117/12.2217059

Guided ultrasound calibration: where, how, and how many calibration fiducials

Published in International Journal of Computer Assisted Radiology and Surgery, 2016

In this journal paper, we introduced a novel concept of GUIDED ultrasound calibration where the acquisition of ultrasound calibration fiducial is guided by a target registration error (TRE) model. This work was presented at IPCAI 2016.

Recommended citation: Chen ECS, Peters TM, Ma B, (2016). "Guided ultrasound calibration: where, how, and how many calibration fiducials"; in International Journal of Computer Assisted Radiology and Surgery, 11(6), pp. 889-898. https://doi.org/10.1007/s11548-016-1390-7

Characterization of various tissue mimicking materials for medical ultrasound imaging

Published in SPIE Medical Imaging, 2016

In this peer-reviewed conference paper, we investigated the acoustic characteristics of polyvinyl chloride (PVC) plastisol, polydimethylsiloxane (PDMS), and isopropanol in the context of medical ultrasound imaging.

Recommended citation: Thouvenot A, Poepping T, Peters TM, Chen ECS, (2016). "Characterization of various tissue mimicking materials for medical ultrasound imaging"; in SPIE Medical Imaging: Physics of Medical Imaging, 9783, pp. 1436-1444. https://doi.org/10.1117/12.2218160

A framework for patient-specific spinal intervention simulation: application to lumbar spinal durotomy repair

Published in Medicine Meets Virtual Reality (MMVR22), 2016

In this journal paper, we presented a functional and patient-specific lumbar phantom for the training of spinal durotomy and dura closure under microscopic view, consisting of a lumbar model, pressurized dural surrogate, together immersed in a tissue-mimicking layer simulating fat, muscle and skin. This work was initially presented at MMVR-22.

Recommended citation: Lau JC, Denning L, Lownie SP, Peters TM, Chen ECS, (2016). "A framework for patient-specific spinal intervention simulation: application to lumbar spinal durotomy repair"; in Studies in Health Technology and Informatics, 220(MMVR-22), pp. 185-192. https://pubmed.ncbi.nlm.nih.gov/27046576/

P.012 Spinal durotomy repair simulator for deliberate microsurgical practice: Integration into a residency training module

Published in Canadian Journal of Neurological Sciences / Journal Canadien Des Sciences Neurologiques, 2016

In this conference paper, we introduced the effecacy of a physical model for the training of spinal durotomy. This work was presented at the 51th Annual Congress of the Canadian Neurological Sciences Federation and received the Best Poster Award.

Recommended citation: Lau JC, Denning L, Lownie SP, Peters TM, Chen ECS, (2016). "P.012 Spinal durotomy repair simulator for deliberate microsurgical practice: Integration into a residency training module"; in Canadian Journal of Neurological Sciences / Journal Canadien Des Sciences Neurologiques, 43(S2), pp. S24. https://doi.org/10.1017/cjn.2016.118

Effects of line fiducial parameters and beamforming on ultrasound calibration

Published in Journal of Medical Imaging, 2017

In this journal paper, we investigated the effects of ultrasound image reconstruction techniques as well as phantom material and geometry on ultrasound probe calibration.

Recommended citation: Ameri G, Baxter JS, McLeod AJ, Peters TM, Chen ECS, (2017). "Effects of line fiducial parameters and beamforming on ultrasound calibration"; in Journal of Medical Imaging, 4(1), pp. 1-11. https://doi.org/10.1117/1.JMI.4.1.015002

Which point-line registration?

Published in SPIE Medical Imaging, 2017

In this peer-reviewed conference paper, we presented a generalized solution for the registration between homologous points and lines, i.e. Procrustean registration.

Recommended citation: Chen ECS, Peters TM, Ma B, (2017). "Which point-line registration?"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 1013509, pp. 70-82. https://doi.org/10.1117/12.2253692

Hologram stability evaluation for Microsoft HoloLens

Published in SPIE Medical Imaging, 2017

In this peer-reviewed conference paper, we developed an evaluation protocol for the Microsoft HoloLens ability to maintain the hologram in its intended pose.

Recommended citation: Vassallo R, Rankin A, Chen ECS, Peters TM, (2017). "Hologram stability evaluation for Microsoft HoloLens"; in SPIE Medical Imaging: Image Perception, Observer Performance, and Technology Assessment, 10136, pp. 295-300. https://doi.org/10.1117/12.2255831

Is pose-based pivot calibration superior to sphere fitting?

Published in SPIE Medical Imaging, 2017

In this peer-reviewed conference paper, we investigated how to perform pivot calibration, a task commonly employed in surgical navigation systems and computer-assisted orthopaedics surgery.

Recommended citation: Ma B, Banihaveb N, Choi J, Chen ECS, Simpson AL, (2017). "Is pose-based pivot calibration superior to sphere fitting?"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 101351U, pp. 476-483. https://doi.org/10.1117/12.2256050

Contact-less stylus for surgical navigation: registration without digitization

Published in International Journal of Computer Assisted Radiology and Surgery, 2017

In this journal paper, we presented a laser-based, contact-less, stylus for the purpose of fiducial registration and digitization in the context of surgical navigation. This work was initially presented at IPCAI 2017.

Recommended citation: Chen ECS, Ma B, Peters TM, (2017). "Contact-less stylus for surgical navigation: registration without digitization"; in International Journal of Computer Assisted Radiology and Surgery, 12(7), pp. 1231-1241. https://doi.org/10.1007/s11548-017-1576-7

Hand-eye calibration for surgical cameras: a Procrustean Perspective-n-Point solution

Published in International Journal of Computer Assisted Radiology and Surgery, 2017

In this journal paper, we introduced a novel hand-eye calibration for navigated camera based on point-line Procrustean registration. This work was initially presented at IPCAI-2017.

Recommended citation: Morgan I, Jayarathne U, Rankin A, Peters TM, Chen ECS, (2017). "Hand-eye calibration for surgical cameras: a Procrustean Perspective-n-Point solution"; in International Journal of Computer Assisted Radiology and Surgery, 12(7), pp. 1141–1149. https://doi.org/10.1007/s11548-017-1590-9

Mixed reality ultrasound guidance system: a case study in system development and a cautionary tale

Published in International Journal of Computer Assisted Radiology and Surgery, 2017

The purpose of this journal paper is to identify and critically examine development guidelines in the context of a mixed reality ultrasound guidance system through a case study. This work was initially presented at CARS-2017.

Recommended citation: Ameri G, Baxter JSH, Bainbridge D, Peters TM, Chen ECS, (2018). "Mixed reality ultrasound guidance system: a case study in system development and a cautionary tale"; in International Journal of Computer Assisted Radiology and Surgery, 13(4), pp. 495–505. https://doi.org/10.1007/s11548-017-1665-7

Real-time 3D ultrasound reconstruction and visualization in the context of laparoscopy

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2017

In the context of laparoscopic interventions involving intracorporeal ultrasound, we present a method to visualize hidden targets in 3D in this MICCAI paper.

Recommended citation: Jayarathne UL, Moore J, Chen ECS, Pautler SE, Peters TM., (2017). "Real-time 3D ultrasound reconstruction and visualization in the context of laparoscopy"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2017, LNCS 10434, pp. 602-609. https://doi.org/10.1007/978-3-319-66185-8_68

Hand–eye calibration using a target registration error model

Published in Healthcare Technology Letters/Augmented Environments for Computer Assisted Interventions (AE-CAI), 2017

In this journal paper, we introduced an effective hand-eye calibration for surgical camera where the measurement of the calibration fiducial is guided by a target registration error (TRE) model. This work was initally presented at AE-CAI 2017.

Recommended citation: Chen ECS, Morgan I, Jayarathne U, Ma B, Peters TM, (2017). "Hand–eye calibration using a target registration error model"; in Healthcare Technology Letters, 4(5), pp. 157-162. https://ieeexplore.ieee.org/abstract/document/8107162

Signal dropout correction-based ultrasound segmentation for diastolic mitral valve modeling

Published in Journal of Medical Imaging, 2018

In this journal paper, we proposed a signal dropout correction-based ultrasound segmentation method for diastolic Mitral valve modeling.

Recommended citation: Xia W, Moore J, Chen ECS, Xu Y, Ginty O, Bainbridge D, Peters TM, (2018). "Signal dropout correction-based ultrasound segmentation for diastolic mitral valve modeling"; in Journal of Medical Imaging, 15(2), pp. 1-6. https://doi.org/10.1117/1.JMI.5.2.021214

Robust, Intrinsic Tracking of a Laparoscopic Ultrasound Probe for Ultrasound-Augmented Laparoscopy

Published in IEEE Transactions on Medical Imaging (IEEE-TMI), 2018

In this journal paper, we proposed an accurate image-based tracking that is robust to partial occlusion of the fiducials and outliers.

Recommended citation: Jayarathne UL, Chen ECS, Moore J, Peters TM, (2019). "Robust, Intrinsic Tracking of a Laparoscopic Ultrasound Probe for Ultrasound-Augmented Laparoscopy"; in IEEE Transactions on Medical Imaging, 38(2), pp. 460-469. https://doi.org/10.1109/TMI.2018.2866183

Endoscopic Laser Surface Scanner for Minimally Invasive Abdominal Surgeries

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2018

In this MICCAI paper, we presented a 3D surface laser scanner for endoscopic surgery.

Recommended citation: Geurten J, Xia W, Jayarathne U, Peters TM, Chen ECS, (2018). "Endoscopic Laser Surface Scanner for Minimally Invasive Abdominal Surgeries"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2018, LNCS 11073, pp. 143-150. https://doi.org/10.1007/978-3-030-00937-3_17

Endoscopic image enhancement with noise suppression

Published in Healthcare Technology Letters/Augmented Environments for Computer Assisted Interventions (AE-CAI), 2018

In this journal paper, we introduced an effective method for endoscopic image enhancement by identifying different illumination regions and designing the enchancement design criteria for desired image quality. This work was initally presented at AE-CAI 2018.

Recommended citation: Xia W, Chen ECS, Peters T, (2018). "Endoscopic image enhancement with noise suppression"; in Healthcare Technology Letters, 5(5), pp. 154-157. https://ieeexplore.ieee.org/abstract/document/8527689

Tracking and Calibration

Published in Mixed and Augmented Reality in Medicine (Book), 2018

In this book chapter, we described issues related to the fundamental problem of tracking calibrated surgical instruments in MR and AR surgical applications.

Recommended citation: Chen ECS, Ma B, (2018). "Tracking and Calibration"; in T.M. Peters, C.A. Linte, Z. Yaniv, & J. Williams (Eds.) Mixed and Augmented Reality in Medicine, 1st ed. Chap. 2, pp. 15–28. https://doi.org/10.1201/9781315157702

Registration

Published in Mixed and Augmented Reality in Medicine (Book), 2018

In this book chapter, we provided a short overview of the mathematical principles behind registration.

Recommended citation: Maier-Hein L, Speidel S, Stenau E, Chen ECS, Ma B, (2018). "Registration"; in T.M. Peters, C.A. Linte, Z. Yaniv, & J. Williams (Eds.) Mixed and Augmented Reality in Medicine, 1st ed. Chap. 3, pp. 29–46. https://doi.org/10.1201/9781315157702

Ultrasound calibration for unique 2.5D conical images

Published in SPIE Medical Imaging, 2019

In this peer-reviewed conference paper, we introduced a novel ultrasound probe calibration method for the unique 2.5D conic image of an intracardiac echocardiography system.

Recommended citation: Nisar H, Moore J, Alves N, Hwang G, Peters TM, Chen ECS, (2019). "Ultrasound calibration for unique 2.5D conical images"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 1095126, pp. 573-582. https://doi.org/10.1117/12.2506193

The effect of imaging and tracking parameters on ultrasound probe calibration robustness

Published in SPIE Medical Imaging, 2019

In this peer-reviewed conference paper, we investigated the effect of ultrasound imaging and spatial tracking parameters on ultrasound probe calibration robustness.

Recommended citation: Groves LA, Rankin A, Peters TM, Chen ECS, (2019). "The effect of imaging and tracking parameters on ultrasound probe calibration robustness"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 109510X, pp. 231-241. https://doi.org/10.1117/12.2513057

Accuracy assessment for the co-registration between optical and VIVE head-mounted display tracking

Published in International Journal of Computer Assisted Radiology and Surgery, 2019

In this journal paper, we reported on the development and accuracy assessment of a hybrid tracking system that integrates optical spatial tracking into a video pass-through head-mounted display. This work was initially presented at IPCAI-2019.

Recommended citation: Groves LA, Carnahan P, Allen DR, Adam R, Peters TM, Chen ECS, (2019). "Accuracy assessment for the co-registration between optical and VIVE head-mounted display tracking"; in International Journal of Computer Assisted Radiology and Surgery, 14(7), pp. 1207-1215. https://doi.org/10.1007/s11548-019-01992-4

IJCARS—IPCAI 2019 special issue: conference information processing for computer-assisted interventions, 10th international conference 2019—part 1

Published in International Journal of Computer Assisted Radiology and Surgery, 2019

The preface of the special issue of IJCARS for IPCAI, for which I, along with Kanako Harada and Raphael Sznitman, served as the Program Chair.

Recommended citation: Chen ECS, Harada K, Sznitman R, (2019). "IJCARS—IPCAI 2019 special issue: conference information processing for computer-assisted interventions, 10th international conference 2019—part 1"; in International Journal of Computer Assisted Radiology and Surgery, 14(6), pp. 911-912. https://doi.org/10.1007/s11548-019-02000-5

Quantitative analysis of needle navigation under ultrasound guidance in simulated central venous line procedure

Published in Ultrasound in Medicine & Biology, 2019

In this journal paper, we identified realiable quantitative metrics to establish standars for the attainment and maintenance of competence in the context of surgical guidance of needle interventions.

Recommended citation: Ameri G, Bainbridge D, Peters TM, Chen ECS, (2019). "Quantitative analysis of needle navigation under ultrasound guidance in simulated central venous line procedure"; in Ultrasound in Medicine & Biology, 44(8), pp. 1891-1900. https://doi.org/10.1016/j.ultrasmedbio.2018.05.004

A global optimization method for specular highlight removal from a single image

Published in IEEE Access, 2019

In this journal paper, we proposed a global optimization method for specular highlight removal from a single image based on a dichromatic reflection model.

Recommended citation: Xia W, Chen ECS, Pautler SE, Peters TM, (2019). "Multi-view 3D echocardiography volume compounding for mitral valve procedure planning"; in IEEE Access, 7, pp. 125976-125990. https://ieeexplore.ieee.org/abstract/document/8822996

Development and evaluation of an Augmented Reality ultrasound guidance system for spinal anesthesia: preliminary results

Published in Ultrasound in Medicine & Biology, 2019

In this journal paper, we presented an augmented reality (AR) ultrasound guidance system that addresses challenges in both needle visualization during navigation and epidural space identification for needle positioning.

Recommended citation: Ameri G, Rankin A, Baxter JSH, Moore J, Ganapathy S, Peters TM, Chen ECS, (2019). "Development and evaluation of an Augmented Reality ultrasound guidance system for spinal anesthesia: preliminary results"; in Ultrasound in Medicine & Biology, 45(10), pp. 2736-2746. https://doi.org/10.1016/j.ultrasmedbio.2019.04.026

Towards a Mixed-Reality first person point of view needle navigation system

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2019

In this MICCAI paper, we presented a First-Person Point-of-View surgical navigation system based on accurate hybrid tracking of a commercial head-mounted display.

Recommended citation: Groves L, Li N, Peters T, Chen ECS, (2019). "Towards a Mixed-Reality first person point of view needle navigation system"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2019, LNCS 11768, pp. 245-253. https://doi.org/10.1007/978-3-030-32254-0_28

Deep learning approach for automatic out-of-plane needle localisation for semi-automatic ultrasound probe calibration

Published in Healthcare Technology Letters/Augmented Environments for Computer Assisted Interventions (AE-CAI), 2019

In this journal paper, we presented a deep-learning framework for automatic segmentation of needle in ultrasound images inserted in the out-of-plane approach. This work was initially presented at AE-CAI 2019.

Recommended citation: Groves LA, VanBerlo B, Peters TM, Chen ECS, (2019). "Deep learning approach for automatic out-of-plane needle localisation for semi-automatic ultrasound probe calibration"; in Healthcare Technology Letters, 6(6), pp. 204-209. https://ieeexplore.ieee.org/abstract/document/8948554

Miniature C-arm simulator using wireless accelerometer based tracking

Published in SPIE Medical Imaging, 2020

In this peer-review conference paper, we presented a physical C-arm simulator for the training of C-arm positioning for interventional procedures.

Recommended citation: Allen DR, Moore J, Joschko A, Clarke C, Peters TM, Chen ECS, (2020). "Miniature C-arm simulator using wireless accelerometer based tracking"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 1131502, pp. 1-9. https://doi.org/10.1117/12.2547388

Patient-specific, dynamic models of hypoplastic left heart syndrome tricuspid valves for simulation and planning

Published in SPIE Medical Imaging, 2020

In this peer-review conference paper, we presented a physical model of patient-specific heart valve targetted for the hypoplastic left heart syndrome (HLHS).

Recommended citation: Boone N, Nam HH, Moore J, Carnahan P, Ginty O, Herz C, Lasso A, Jolley MA, Chen ECS, Peters TM, (2020). "Patient-specific, dynamic models of hypoplastic left heart syndrome tricuspid valves for simulation and planning"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 113152E, pp. 613-621. https://doi.org/10.1117/12.2549745

Applications of VR medical image visualization to chordal length measurements for cardiac procedures

Published in SPIE Medical Imaging, 2020

In this peer-review conference paper, we demonstrated a novel use of a virtual-reality system to improve image visualization, usability and reduces surgical errors in case planning.

Recommended citation: Carnahan P, Moore J, Bainbridge D, Wheeler G, Deng S, Pushparajah K, Chen ECS, Simpson J , Peters TM, (2020). "Applications of VR medical image visualization to chordal length measurements for cardiac procedures"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 1131528, pp. 578-584. https://doi.org/10.1117/12.2549597

Towards electromagnetic tracking of J-tip guidewire: precision assessment of sensors during bending tests

Published in SPIE Medical Imaging, 2020

In this peer-review conference paper, we presented preliminary results on a sensors bending test in static conditions to assess whether and when the precision of the sensor remains unchanged and/or deteriorates.

Recommended citation: Piazza R, Nisar H, Moore J, Condino S, Ferrari M, Ferrari V, Peters TM, Chen ECS, (2020). "Towards electromagnetic tracking of J-tip guidewire: precision assessment of sensors during bending tests"; in SPIE Medical Imaging: Image-Guided Procedures, Robotic Interventions, and Modeling, 1131506, pp. 37-46. https://doi.org/10.1117/12.2549764

The effects of positioning on the volume/location of the internal jugular vein using 2-dimensional tracked ultrasound

Published in Journal of Cardiothoracic and Vascular Anesthesia, 2020

In this clinical journal paper, we investigated the effect of different position on the volume and location of the international jugular vein using tracked ultrasound.

Recommended citation: Wang W, Liao X, Chen ECS, Moore J, Baxter JSH, Peters TM, Bainbridge D, (2020). The effects of positioning on the volume/location of the internal jugular vein using 2-dimensional tracked ultrasound"; in Journal of Cardiothoracic and Vascular Anesthesia, 34(4), pp. 920-925. https://doi.org/10.1053/j.jvca.2019.08.049

Interventional imaging: Ultrasound

Published in Handbook of Medical Image Computing and Computer Assisted Intervention (Book), 2020

In this book chapter, we outlined some of the engineering challenges that need to be overcome in order to enhance the widespread use of ultrasound imaging as an interventional guidance and monitoring tool.

Recommended citation: Hacihaliloglu I, Chen ECS, Mousavi P, Abolmaesumi P, Boctor E, Linte C, (2020). "Interventional imaging: Ultrasound"; in S.K. Zhou, D. Rueckert, and G. Fichtinger (Eds.) Handbook of Medical Image Computing and Computer Assisted Intervention, Chap. 28, pp. 701-720. https://doi.org/10.1016/B978-0-12-816176-0.00033-8

External tracking devices and tracked tool calibration

Published in Handbook of Medical Image Computing and Computer Assisted Intervention (Book), 2020

In this book chapter, we provided a short overview on the principle tracking technology, error propagation, and specifics of surgical instrument calibration.

Recommended citation: Chen ECS, Lasso A, Fichtinger G, (2020). "External tracking devices and tracked tool calibration"; in S.K. Zhou, D. Rueckert, and G. Fichtinger (Eds.) Handbook of Medical Image Computing and Computer Assisted Intervention, Chap. 31, pp. 777-794. https://doi.org/10.1016/B978-0-12-816176-0.00036-3

A simple, realistic walled phantom for intravascular and intracardiac applications

Published in International Journal of Computer Assisted Radiology and Surgery, 2020

In this journal paper, we presented a simple and yet realistic walled phantom under ultrasound imaging for intravascular and intracardiac applications. This work was initially presented at CARS-2020.

Recommended citation: Nisar H, Moore J, Piazza R, Maneas E, Chen ECS, Peters TM, (2020). "A simple, realistic walled phantom for intravascular and intracardiac applications"; in International Journal of Computer Assisted Radiology and Surgery, 15(9), pp. 1513–1523. https://doi.org/10.1007/s11548-020-02201-3

Automatic segmentation of the carotid artery and internal jugular vein from 2D ultrasound images for 3D vascular reconstruction

Published in International Journal of Computer Assisted Radiology and Surgery, 2020

In this journal paper, this work formulated and compares Mask R-CNN and U-Net-based algorithms to automatically segment the carotid artery (CA) and internal jugular vein (IJV) from transverse neck ultrasound (US), in the context of analyzing neck vascular morphology. This work was initially presented at IPCAI-2020.

Recommended citation: Groves LA, VanBerlo B, Veinberg N, Alboog A, Peters TM, Chen ECS, (2020). "Automatic segmentation of the carotid artery and internal jugular vein from 2D ultrasound images for 3D vascular reconstruction"; in International Journal of Computer Assisted Radiology and Surgery, 15(11), pp. 1835-1846. https://doi.org/10.1007/s11548-020-02248-2

Improving central line needle insertions using in-situ vascular reconstructions

Published in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2020

In this journal paper, we conducted an user study for clinicians to perform simulated central line insertion, where the vessel geometry was automatically segmented from tracked 2D ultrasound and reconstructed in 3D. This work was initially presented at AECAI-2020.

Recommended citation: Groves LA, Li N, VanBerlo B, Veinberg N, Peters TM, Chen ECS, (2021). "Improving central line needle insertions using in-situ vascular reconstructions"; in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, (9)4, pp. 363-369. https://doi.org/10.1080/21681163.2020.1835542

Quantitative Assessments for Ultrasound Probe Calibration

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2021

In this MICCAI paper, we introduced a validation framework for ultrasound probe calibration using Procrustean registration methods.

Recommended citation: Chen ECS, Ma, B, Peters TM, (2021). "Quantitative Assessments for Ultrasound Probe Calibration"; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2021, LNCS 12904, pp. 363–372. https://doi.org/10.1007/978-3-030-87202-1_35

DeepMV: Fully Automatic Ultrasound Segmentation for Patient Specific Mitral Valve Modelling

Published in Medical Image Computing and Computer Assisted Intervention (MICCAI), 2021

In this MICCAI paper, we introduced a deep-learning approach to fully automatically segment mitral valve from transesophagel echocardiography (TEE).

Recommended citation: Carnahan P., Moore J., Bainbridge D., Eskandari M., Chen ECS, Peters TM, (2021). DeepMitral: Fully Automatic 3D Echocardiography Segmentation for Patient Specific Mitral Valve Modelling; in Medical Image Computing and Computer Assisted Intervention -- MICCAI 2021, LNCS 12904, pp. 459-468. https://doi.org/10.1007/978-3-030-87240-3_44

Laparoscopic image enhancement based on distributed retinex optimization with refined information fusion

Published in Neurocomputing, 2021

In this Neurocomputing paper, we presented a framework to enhance laparoscopic image based on the distributed retinex optimization.

Recommended citation: Xia W., Chen ECS, Pautler, S., Peters, TM, (2022). "Laparoscopic image enhancement based on distributed retinex optimization with refined information fusion"; in Neurocomputing, 483(), pp 460-473. https://doi.org/10.1016/j.neucom.2021.08.142

Towards a First-Person Perspective Mixed Reality Guidance System for Needle Interventions

Published in Journal of Imaging, 2022

In this JMI paper, we present a head-mounted-display (MHD) based mixed-reality system for needle-based surgical intervention. The main contribution is that we demonstrate the efficacy of needle guidance using the first-person-perspective visualization paradigm, as compared to the traditional 2D display.

Recommended citation: Groves LA, Li N., Peters TM, Chen ECS, (2022). "Towards a First-Person Perspective Mixed Reality Guidance System for Needle Interventions"; in Journal of Imaging, (8)1, pp. https://www.mdpi.com/2313-433X/8/1/7

Development of a multi-modal liver phantom with flow for the validation and training of focal ablation procedures

Published in SPIE Medical Imaging, 2022

In this SPIE Medical Imaging paper, we present a liver phantom that is ultrasound/CT/MRI compatible, with simulated tumor and vasculature.

Recommended citation: Chazot, N., Cambranis-Romero, J., Rankin, A., Peters, TM., and Chen ECS. (2022). "Development of a multi-modal liver phantom with flow for the validation and training of focal ablation procedures"; in SPIE Medical Imaging, 120342F https://doi.org/10.1117/12.2611919

Development of a mini stereotactic guidance system for percutaneous focal liver tumor ablation

Published in SPIE Medical Imaging, 2022

In this SPIE Medical Imaging paper, we present a surgical navigation system based on free-hand ultrasound for percutaneous radiofrequency ablation (RFA) treatment of liver tumour.

Recommended citation: Cambranis-Romero, J., Peters, TM, and Chen ECS. (2022). "Development of a mini stereotactic guidance system for percutaneous focal liver tumor ablation"; in SPIE Medical Imaging, 120342F https://doi.org/10.1117/12.2611524

The automatic localization of the vena contracta using Intracardiac Echocardiography (ICE): a feasibility study

Published in SPIE Medical Imaging, 2022

In this SPIE Medical Imaging paper, we present a method to automatically localized the vena contracta using 3D intracardiac echocardiography..

Recommended citation: Fakim, D., Nisar, H., Moore, J., Peters, TM., Chen ECS., (2022). "The automatic localization of the vena contracta using Intracardiac Echocardiography (ICE): a feasibility study"; in SPIE Medical Imaging, 120340P https://doi.org/10.1117/12.2610813

Towards ultrasound-based navigation: deep learning based IVC lumen segmentation from intracardiac echocardiography

Published in SPIE Medical Imaging, 2022

In this SPIE Medical Imaging paper, we proposed an ultrasound-based navigation for intracardiac procedured by using deep-learning methods to generate a 3D roadmap.

Recommended citation: Nisar, H., Carnahan, PK., Fakim, D., Akhuanzada, H., Hocking, D.,Peters, TM., Chen ECS., (2022). "Towards ultrasound-based navigation: deep learning based IVC lumen segmentation from intracardiac echocardiography"; in SPIE Medical Imaging, 1203422 https://doi.org/10.1117/12.2611117

Intra-procedural evaluation of tumor coverage using 3D US images for percutaneous focal liver thermal ablation

Published in SPIE Medical Imaging, 2022

In this SPIE Medical Imaging paper, we present a method to estimate, visualize, and evaluate the intended ablation zone for tumour coverage.

Recommended citation: Xing, S., Cambranis-Romero, J., Cool, DW., Mujoomdar, A., Cardarelli Leite, L., Chen ECS., Peters, TM., and Fenster, A., (2022). "Intra-procedural evaluation of tumor coverage using 3D US images for percutaneous focal liver thermal ablation"; in SPIE Medical Imaging, 120340P https://doi.org/10.1117/12.2611864

A 2D/3D US/CT-guided system for percutaneous focal liver thermal ablation

Published in SPIE Medical Imaging, 2022

In this SPIE Medical Imaging paper, we present a surgical guidence using ultrasound and CT for percutaneous focal treatment of liver tumours.

Recommended citation: Xing, S., Cool, DW., Gardi, L., Bax, J., Chen ECS., Peters, TM., and Fenster, A. (2022). "A 2D/3D US/CT-guided system for percutaneous focal liver thermal ablation"; in SPIE Medical Imaging, 12034 https://doi.org/10.1117/12.2612085

Toward Fluoro-Free Interventions: Using Radial Intracardiac Ultrasound for Vascular Navigation

Published in Ultrasound in Medicine & Biology, 2022

In this UMB paper, we present an approach towards radiation-free intracardiac procedure using radial intracardiac ultrasound.

Recommended citation: Nisar, H., Groves, L., Cardarelli-Leite, L., Peters, TM. and Chen ECS. (2022). "Toward Fluoro-Free Interventions: Using Radial Intracardiac Ultrasound for Vascular Navigation"; in Ultrasound in Medicine & Biology, 48(7), pp 1290-1298. https://www.sciencedirect.com/science/article/pii/S0301562922000898

Multi-View 3D Transesophageal Echocardiography Registration and Volume Compounding for Mitral Valve Procedure Planning

Published in Applied Sciences, 2022

In this Applied Sciences paper, we present a method to stich (i.e. compounding) multiple 3D ultrasound volumes without external tracking system to generate a complete view of the heart.

Recommended citation: Carnahan, P., Moore, J., Bainbridge, D., Chen ECS, Peters TM. (2022). "Multi-View 3D Transesophageal Echocardiography Registration and Volume Compounding for Mitral Valve Procedure Planning"; in Applied Sciences, 12(9), 4562. https://www.mdpi.com/2076-3417/12/9/4562

Special issue on 2021 augmented environments for computer-assisted interventions (AE-CAI): guest editors’ foreword

Published in Augmented Environments for Computer-Assisted Interventions, 2022

The editorial for AE-CAI 2021.

Recommended citation: Linte, CA., Chen ECS., Dou, Q., Drouin, S., Kersten-Oertel, M., McLeod, AJ., Sarikaya, D., and Yaniv, Z.,(2022). "Special issue on 2021 augmented environments for computer-assisted interventions (AE-CAI): guest editors’ foreword"; in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 10(3), pp.241-242. https://doi.org/10.1080/21681163.2021.2009379

3D localization of vena contracta using Doppler ICE imaging in tricuspid valve interventions

Published in Computer Assisted Radiology and Surgery, 2022

In this IJCARS paper (presented at CARS2022, Japan), we proposed a method to localize vena contracta using ICE ultrasound.

Recommended citation: Nisar, H., Fakim, D., Chen ECS., Bainbridge, D., Peters, TM.,(2022). "3D localization of vena contracta using Doppler ICE imaging in tricuspid valve interventionsd"; in International Journal of Computer Assisted Radiology and Surgery, (17)9, pp. 1569-1577. https://doi.org/10.1007/s11548-022-02660-w

3D US-based Evaluation and Optimization of Tumor Coverage for 2D US-guided Percutaneous Liver Thermal Ablation

Published in IEEE Transactions on Medical Imaging, 2022

In this IEEE-TMI paper, we evaluate the intra-procedural tumor coverage using 3D ultrasound and investigate whether it can provide clinically needed information.

Recommended citation: Xing, S., Cambranis-Romero J., Cool, D.W., Mujoomdar, A., Chen ECS, Peters, TM., and Fenster A., (2022). "3D US-based Evaluation and Optimization of Tumor Coverage for 2D US-guided Percutaneous Liver Thermal Ablation"; in IEEE Transactions on Medical Imaging, (41)11, pp.3344-3356 https://ieeexplore.ieee.org/document/9800921

Automatic plane of minimal hiatal dimensions extraction from 3D female pelvic floor ultrasound

Published in IEEE Transactions on Medical Imaging, 2022

In this IEEE-TMI paper, we present an automatic approach to identify the anatomical landmarks and extract the plane of minimal hiatal dimensions (PMHD) from 3D pelvic ultrasound volumes.

Recommended citation: Xia, W., Ameri, G., Fakim, D., Akhuanzada, H., Raze, M.Z., Shobeiri, S.A., McLean, L., Chen ECS, (2022). "Automatic plane of minimal hiatal dimensions extraction from 3D female pelvic floor ultrasound"; in IEEE Transactions on Medical Imaging, (41)12, pp. 3873-3883 https://ieeexplore.ieee.org/document/9863685

Unified Calibration Technique for Augmented-Reality Ultrasound-Guided Interventions

Published in MetroXRAINE, 2022

In this IEEE MetroXRAINE paper, we present a unified framework for the calibration of surgical instruments (ultrasound probes and surgical cameras).

Recommended citation: Chen ECS., Allen, DR., Cambranis-Romero, J., and Peters, TM. (2022). "Unified Calibration Technique for Augmented-Reality Ultrasound-Guided Interventions"; in IEEE MetroXRAINE, pp. 495-500 https://doi.org/10.1109/MetroXRAINE54828.2022.9967585

Development and evaluation of an open-source virtual reality C-Arm simulator

Published in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2022

In this AE-CAI paper, we propose a Virtual Reality C-Arm simulator for interventional spine procedure training.

Recommended citation: Allen, D., Clarke, C., Peters, TM., Chen ECS, (2023). "Development and evaluation of an open-source virtual reality C-Arm simulator"; in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, (11)4, pp. 1090-1095 https://doi.org/10.1080/21681163.2022.2152374

Towards virtual displays in the interventional radiology suite: a feasibility study

Published in SPIE Medical Imaging, 2023

In this SPIE Medical Imaging paper, we present a method to view real-time fluoro and ultrasound video in the Microsoft Hololens 2.

Recommended citation: Allen, DR, Cattari, N., Cambranis-Romero, J., Peters, TM, and Chen ECS. (2023). "Towards virtual displays in the interventional radiology suite: a feasibility study"; in SPIE Medical Imaging, 12466 https://doi.org/10.1117/12.2654267

Real-time mitral annulus segmentation from 4D transesophageal echocardiography using deep learning regression

Published in SPIE Medical Imaging, 2023

In this SPIE Medical Imaging paper, we present a method to segment the mitral annulus from 4D TEE in real-time.

Recommended citation: Carnahan, P., Bharucha, A., Bainbridge, D., Chen ECS, and Peters TM. (2023). "Real-time mitral annulus segmentation from 4D transesophageal echocardiography using deep learning regression"; in SPIE Medical Imaging, 12464 https://doi.org/10.1117/12.2653618

Open source video-based hand-eye calibration

Published in SPIE Medical Imaging, 2023

In this SPIE Medical Imaging paper, we present an open-source software for the hand-eye calibration of surgical cameras.

Recommended citation: Kemper, TH., Allen, DR, Rankin, A., Peters, TM, and Chen ECS. (2023). "Open source video-based hand-eye calibration"; in SPIE Medical Imaging, 12466 https://doi.org/10.1117/12.2651160

3D US-CT/MRI registration for percutaneous focal liver tumor ablations

Published in IJCARS, 2023

In this IJCARS paper, we present a registration method to aling preoperative CT/MRI with intraoperative 3D ultrasound to improve the visibility of liver tumour.

Recommended citation: Xing, S., Cambranis-Romero, J., Roy, P., Cool, DW., Chen ECS., Peters, TM. and Fenster A. (2023). "3D US-CT/MRI registration for percutaneous focal liver tumor ablations"; in International Journal of Computer Assisted Radiology and Surgery, 18(7) pp. 1159--1166 https://doi.org/10.1007/s11548-023-02915-0

X-ray image decomposition for improved magnetic navigation

Published in IJCARS, 2023

In this IJCARS paper, we present a x-ray decomposition method that removes the imaging artefacts of a magnetic field generator from fluoroscopic images as to enable fluoro-based, magnetically-tracked, surgical navigation.

Recommended citation: Xia, W., Xing, S., Jarayathne, U., Pardasani, U., Peters, TM., and Chen ECS.(2023). "X-rayimagedecompositionforimprovedmagneticnavigation"; in International Journal of Computer Assisted Radiology and Surgery, 18(7) pp. 1225--1233 https://doi.org/10.1007/s11548-023-02958-3

A Method for Chronic and Semi-chronic Microelectrode Array Implantation in Deep Brain Structures Using Image Guided Neuronavigation

Published in Journal of Neuroscience Methods, 2023

In this Neuroscience Methods paper, we present a mechatronic system for the improved image-guided neuronavigation targeting of subcortical structures in macaque monkeys.

Recommended citation: Mahmoudian, B., Dalal, H., Lau, J., Corrigan, B., Barker, K., Rankin, A., Chen, ECS, Peters, TM. Martinez-Trujillo, JC. (2023). "A Method for Chronic and Semi-chronic Microelectrode Array Implantation in Deep Brain Structures Using Image Guided Neuronavigation", in Journal of Neuroscience Methods, pp. 109948 https://doi.org/10.1016/j.jneumeth.2023.109948

software

Orthogonal Procrustes Analysis with anisotropic scaling

Published:

The following matlab code implements an iterative solution to solve the Orthogonal Procrustes Analysis problem with anisotropic scaling. The mathematical foundation was initially presented in [1] in which the Majorization Principle was applied to derived the solution. It has guaranteed convergence. I presented the psudo/matlab code in [2] in the context of ultrasound probe calibration.

Orthogonal Procrustes Analysis with isotropic scaling

Published:

Orthogonal Procrustes Analysis (OPA) refer to the problem that relates two datasets, with known correspondence, through a transformation. In the context of computer-assisted intervention, this problem is often encountered as either a registration or calibration between 2 sets of 3D points. It is also known as landmark-based registration, paired fiducial registration, among others.

Pivot Calibration

Published:

Pivot Calibration

Estimating the location of a tracked tool’s tip relative to its Dynamic Reference Frame (DRF) and localizing a specific point in a tracking system’s coordinate frame are fundamental tasks in image-guided procedures. This is typically achieved using pivot calibration. Below are 3 formulations of pivot calibrations:

Procrustes Analysis

Published:

Procrustes Analysis refers to the registration between two dataset via a transformation, where elements between datasets have known correspondence. In the context of computer-assisted surgery, Procrustes Analysis menifests as point-to-point, point-to-line, and point-to-surface registration.

Orthogonal Procrustes Analysis with anisotropic scaling

Published:

The following matlab code implements an iterative solution to solve the Orthogonal Procrustes Analysis problem with anisotropic weighting. It is taken verbatim from the SPIE MI conference paper by Balachandran and Fitzpatrick [1].

talks

teaching

Introduction to Digital Image Processing

Combined Undergraduate/Graduate course, Western University, ECE 4445a/MedBio 4445a/ECE 9201a/ECE 9021a/BME 9509a, 2015

The course covers fundamental image processing operations that are needed for more advanced study. The operations selected are those commonly used in industry (e.g., quality control) and in research (e.g., medical imaging) and include such operations as computing histograms, contrast enhancement, algebraic operations for noise reduction and background removal, linear filtering and segmentation using techniques such as thresholding. My teaching philosophy is to motivate each topic via a practical example and then build the mathematical framework so you can implement the operation or use the most appropriate MATLAB function intelligently. The course is not about learning off-the-shelf software like Photoshop.

Advanced Image Processing and Analysis

Combined Undergraduate/Graduate course, Western University, ECE 4438b/ ECE 9022b/ECE 9202b/BioMed 9519b/BioPhys 9519b/CAMI 9519b, 2018

Digital image processing has various applications ranging from remote sensing and entertainment to medical applications. This course explores a few major areas of digital image processing at an advanced level, with primary emphasis on medical applications. Topics covered included image segmentation, image registration, validation of image processing algorithms, and image processing using the Insight Toolkit (ITK) and Jupyter Notebook. Examples will be presented to give the students exposure to real world applications.

Advanced Image Processing and Analysis

Combined Undergraduate/Graduate course, Western University, ECE 4438b/ ECE 9022b/ECE 9202b/BioMed 9519b/BioPhys 9519b/CAMI 9519b, 2019

Digital image processing has various applications ranging from remote sensing and entertainment to medical applications. This course explores a few major areas of digital image processing at an advanced level, with primary emphasis on medical applications. Topics covered included image segmentation, image registration, validation of image processing algorithms, and image processing using the Insight Toolkit (ITK) and Jupyter Notebook. Examples will be presented to give the students exposure to real world applications.