Malcolm R. McEwen, PhD

Therapy Physics

In kV x-ray dosimetry, experimental spectral data can be used to benchmark Monte Carlo simulations and, if the experimental is suitably constrained, test the underlying interaction cross-section models used. This project aims to acquire accurate kV x-ray spec...

To provide AAPM members with a centralized, authoritative, and continuously updated web-based resource for obtaining beam quality conversion factors, kQ, and other data needed to realize absorbed dose measurements using the AAPM TG-51 protocol.

This work applies the TG-51 kQ formalism to energies below Co-60 in determining beam quality conversion factors (kQ) for thimble ionization chambers in HDR brachytherapy. The sensitivity of calculations to source-to-detector distance and phantom size is inves...

To demonstrate, for the first time in a clinical setting, the accuracy of a novel robust, dose-rate independent and self-consistent calorimeter system to accurately determine absorbed dose to water in UHDR beams from a Mobetron irradiator.