Dr. Chen provides physics support for the dosimetry staff, maintaining dose and monitor unit calculation software for external beam therapies. She is developing CT simulation procedures for the department and provides quality assurance of CT scanners, simulators, and simulation software. She also participates in planning Cyberknife radiosurgery treatments.
Dr. Chen’s main research interest is in improving patient dose estimates in external beam radiotherapy. She developed a procedure to calibrate an amorphous-silicon portal imaging device for quantitative radiation measurements during a patient’s treatment. She is validating a fast Monte Carlo-based method to calculate electron beam output factors and depth dose curves given patient-specific electron inserts. She is also involved in projects investigating the clinical uses of megavoltage cone-beam CT and participated in a dosimetric comparison of permanent prostate implants using Cs-131 and I-125.
Recent Significant Publications
Graff P, Kirby N, Weinberg V, Chen J, Yom SS, Lambert L, Pouliot J., The Residual Setup Errors of Different IGRT Alignment Procedures for Head and Neck IMRT and the Resulting Dosimetric Impact. Int J Radiat Oncol Biol Phys. 2012 Dec 11.
Roach M 3rd, Lawton CA, Chen J., To treat pelvic nodes or not? Greater testicular scatter does not explain the results of randomized trials. J Clin Oncol. 2010 Sep 1;28(25):e450-2.
Chen J, Irion J, Faddegon BA., Validation of the final aperture superposition technique to calculate electron output factors and depth dose curves. Med Phys. 2009 Aug;36(8):3397-405.
Morin O, Aubry JF, Aubin M, Chen J, Descovich M, Hashemi AB, Pouliot J., Physical performance and image optimization of megavoltage cone-beam CT. Med Phys. 2009 Apr;36(4):1421-32.
Sahgal A, Jabbari S, Chen J, Pickett B, Roach M 3rd, Weinberg V, Hsu IC, Pouliot J. Comparison of dosimetric and biologic effective dose parameters for prostate and urethra using 131Cs and 125I for prostate permanent implant brachytherapy. Int J Radiat Oncol Biol Phys 2008; 72(1):247-54.
Descovich M, Morin O, Aubry JF, Aubin M, Chen J, Bani-Hashemi A, Pouliot J. Characteristics of megavoltage cone-beam digital tomosynthesis. Med Phys 2008; 35(4):1310-6.
Morin O, Gillis A, Descovich M, Chen J, Aubin M, Aubry JF, Chen H, Gottschalk AR, Xia P, Pouliot J. Patient dose considerations for routine megavoltage cone-beam CT imaging. Med Phys 2007; 34(5):1819-27.
Morin O, Chen J, Aubin M, Gillis A, Aubry JF, Bose S, Chen H, Descovich M, Xia P, Pouliot J. Dose calculation using megavoltage cone-beam CT. Int J Radiat Oncol Biol Phys 2007; 67(4):1201-10.