Associate Professor

James Chow


Princess Margaret Cancer Centre
610 University Avenue, Toronto, Ontario Canada M5G 2M9
Clinical Interests
Monte Carlo simulation and graphical user interface development, Radiobiological modeling, Dosimetry of nanoparticle radiosensitizers, Small-animal irradiation and preclinical model, Image guided intensity modulated therapy
Please contact Faculty Member for more information


  • FCCPM, Fellow of the Canadian College of Physicists in Medicine
  • PPhys, Professional physicist certification, Canada
  • CPhys & CSci, Chartered physicist and scientist certification, The Science Council, UK

Professional Memberships

  • Member, AAPM, IEEE and IET

Research Synopsis

  • Monte Carlo simulations for electron and photon beams
  • Nanoparticle dosimetry
  • Dose-volume histogram modeling and treatment plan optimization
  • Preclinical treatment planning system
  • Surface and interface dosimetry
  • Cloud computing in Monte Carlo simulation


Recent Publications


Leung MKK, Chow JCL, Chithrani BD, Lee MJG, Oms B and Jaffray DA. Irradiation of gold nanoparticles by x-rays: Monte Carlo simulation of dose enhancements and the spatial properties of the secondary electrons production. Med Phys, 38: 624-631 2011.

Chow JCL, Leung MKK, Lindsay PE, Jaffray DA. Dosimetric variation due to the photon beam energy in the small-animal irradiation: A Monte Carlo study. Med Phys, 37: 5322-5329 2010

Chow JCL, Markel D, Jiang R. Calculation of normal tissue complication probability using Gaussian error function model. Med Phys, 37: 4924-4929 2010.

Chow JCL, Jiang R. Monte Carlo calculation of monitor unit for electron arc therapy. Med Phys, 37: 1571-1578 2010.

Chow JCL, Leung MKK, Van Dyk Jake. Variations of lung density and geometry on inhomogeneity correction algorithm: A Monte Carlo dosimetric evaluation. Med Phys, 36: 3619-3630 2009.

Chow JCL. Cone-beam CT dosimetry for the positional variation in isocenter: A Monte Carlo study. Med Phys, 36: 3512-3520 2009.

Chow JCL, Owrangi AM. Solid Water as phantom for dosimetry of electron backscatter using low-energy electron beams: A Monte Carlo evaluation. Med Phys, 36: 1587-1594 2009

Chow JCL, Owrangi AM. Depth dependence of electron backscatter: An energy spectral and dosimetry study using Monte Carlo simulation. Med Phys, 36: 594-601 2009.

Chow JCL, Leung MKK. Monte Carlo simulation of MOSFET dosimeter for electron backscatter using the GEANT4 code. Med Phys, 35: 2383-2390 2008.

Chow JCL, Grigorov GN. Monte Carlo simulation of backscatter from lead for clinical electron beams using EGSnrc. Med Phys, 35: 1241–1250 2008.



Assistant Professor, Department of Radiation Oncology, University of Toronto
Adjunct Professor, Department of Physics, Ryerson University
Medical Physicist, Princess Margaret Hospital/University Health Network