Peter G. Watson, PhD, MS

Our university’s Medical Physics M.Sc. prepares students for Canadian board certification through written and oral assessments. Despite the additional time and effort involved, oral exams remain part of the curriculum due to their perceived educational value....

The accurate estimation of patient entrance skin dose (ESD) is an important part of diagnostic radiology quality assurance. ESD is commonly calculated by measuring incident (scatter‑free) air kerma on a PMMA phantom and applying an appropriate backscatter fac...

Background: Comparative studies show that at kilovoltage energies, EGSnrc and Geant4 can differ by several percent in ionization chamber response, particularly in small air cavities and steep dose gradients. These discrepancies are primarily attributed to dif...