Thomas Chen

Postdoctoral Fellow

School of Computing

Queen’s University

Member from 2010 to 2012

Thomas Kuiran Chen (PhD ABD, MSc, MEng) is an expert in ultrasound interventions for computer-assisted surgery, in particular, tracked ultrasound imaging, ultrasound calibration, and ultrasound beamwidth profiling. He holds a patent (2010-2011 pending) for an ultrasound beamwidth profiling system. He is the recipient of 12 international/national awards, prizes and scholarships, including the prestigious Northeastern Association of Graduate Schools (NAGS) Master’s Thesis Award in Physical Sciences, Mathematics, & Engineering for 2005/2006, and Alexander Graham Bell Canada Graduate Scholarship (CGS) 2006-2009. He has a balanced background in both academia and industry where prior to his PhD research at Queen’s University at Kingston, Canada, he had worked as a senior software consultant, system analyst and system designer in finanical and software industry at Asia Pacific region, including Hewlett-Packard (HP) Singapore, Reuters Asia, Arthur Andersen Business Consulting Pte. Ltd., and The Development Bank of Singapore (DBS).

Lasso, Andras; Heffter, Tamas; Pinter, Csaba; Ungi, Tamas; Chen, Thomas K.; Boucharin, Alexis; Fichtinger, Gabor

PLUS: An open-source toolkit for ultrasound-guided intervention systems development Conference

ImNO2012 - Imaging Network Ontario Symposium, Toronto, ON, Canada, 2012.

Links | BibTeX

Peikari, Mohammad; Chen, Thomas K.; Lasso, Andras; Heffter, Tamas; Burdette, E. Clif; Fichtinger, Gabor

Characterization of ultrasound elevation beamwidth artifacts for prostate brachytherapy needle insertion Journal Article

In: Medical Physics, vol. 39, pp. 246-256, 2012, ISSN: 0094-2405.

Abstract | Links | BibTeX

@article{MPeikari2012,

title = {Characterization of ultrasound elevation beamwidth artifacts for prostate brachytherapy needle insertion},

author = {Mohammad Peikari and Thomas K. Chen and Andras Lasso and Tamas Heffter and E. Clif Burdette and Gabor Fichtinger},

url = {http://online.medphys.org/resource/1/mphya6/v39/i1/p246_s1

https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/MPeikari2012.pdf},

doi = {10.1118/1.3669488},

issn = {0094-2405},

year  = {2012},

date = {2012-01-01},

urldate = {2012-01-01},

journal = {Medical Physics},

volume = {39},

pages = {246-256},

abstract = {<p>Purpose: Ultrasound elevation beamwidth leads to image artefacts and uncertainties in localizing objects (such as a surgical needle) in ultrasound images. We examined the clinical significance of errors caused by elevation beamwidth artefacts and imaging parameters in needle insertion procedures. Method: Beveled prostate brachytherapy needles were inserted through all holes of a grid template under real-time transrectal ultrasound (TRUS) guidance. The needle tip position as indicated by the TRUS image was compared to their observed physical location. A new device was developed to measure the ultrasound elevation beamwidth. Result: Imaging parameters of the TRUS scanner have direct impact on the localization error ranging from 0.5 mm upto 4 mm. The smallest localization error was observed laterally close to the center of the grid template, and axially within the beam’s focal zone. Largest localization error occurs laterally around both sides of the grid template, and axially within the beam’s far field. we also found that the localization errors vary with both lateral and elevation offsets. Conclusion: We found properly adjusting the TRUS imaging settings to lower the ultrasound gain and power effectively minimized the appearance of elevation beamwidth artefacts and in turn reduced the localization errors of the needle tip.</p>},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

Chen, Thomas K.; Heffter, Tamas; Lasso, Andras; Pinter, Csaba; Abolmaesumi, Purang; Burdette, E. Clif; Fichtinger, Gabor

Automated Intraoperative Calibration for Prostate Cancer Brachytherapy Journal Article

In: Medical Physics, vol. 38, pp. 6285-6299, 2011.

Links | BibTeX

Lasso, Andras; Heffter, Tamas; Pinter, Csaba; Ungi, Tamas; Chen, Thomas K.; Boucharin, Alexis; Fichtinger, Gabor

PLUS: An open-source toolkit for developing ultrasound-guided intervention systems Conference

4th NCIGT and NIH Image Guided Therapy Workshop, vol. 4, Arlington VA, October 12-13, 2011, 2011.

Links | BibTeX

Bartha, Laura; Lasso, Andras; Chen, Thomas K.; Fichtinger, Gabor

Automatic fiducial localization in ultrasound images for a thermal ablation validation platform Conference

SPIE Medical Imaging, vol. 7964, no. 1, SPIE SPIE, Lake Buena Vista (Orlando), Florida, USA, 2011.

Links | BibTeX

Peikari, Mohammad; Chen, Thomas K.; Fichtinger, Gabor; Burdette, E. Clif

Section-Thickness Profiling for Brachytherapy Ultrasound Guidance Conference

SPIE Medical Imaging, vol. 7964, no. 1, SPIE SPIE, Lake Buena Vista (Orlando), Florida, USA, 2011, ISBN: 9780819485069.

Links | BibTeX

Peikari, Mohammad; Chen, Thomas K.; Lasso, Andras; Heffter, Tamas; Fichtinger, Gabor

Effects of Ultrasound Section-Thickness on Brachytherapy Needle Tip Localization Error Conference

Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011), Toronto, ON, Canada, 2011.

Links | BibTeX

Karim-Aghaloo, Zahra; Abolmaesumi, Purang; Ahmidi, Narges; Chen, Thomas K.; Gobbi, David; Fichtinger, Gabor

Intraoperative localization of brachytherapy implants using intensity-based registration Conference

SPIE Medical Imaging, vol. 7261, 2009.

Links | BibTeX

Karim-Aghaloo, Zahra; Abolmaesumi, Purang; Ahmidi, Narges; Chen, Thomas K.; Gobbi, David; Fichtinger, Gabor

Intra-operative Localization of Brachytherapy Implants Using Intensity-based Registration Conference

7th Imaging Symposium of the Imaging Network of Ontario, 2008.

BibTeX