Leila Lukhumaidze and Miller MacPherson

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Thursday, October 23, 2014
3:30-5 pm
Room RPB 205 (boardroom), Health Canada, 775 Brookfield Road
Leila Lukhumaidze and Miller MacPherson

1. "Electron Impact Ionization in EGSnrc"

Leila Lukhumaidze - Carleton University

Abstract: Monte Carlo simulations play an important role in diagnostic medical imaging, as it is relatively easy to calculate some quantities that are difficult to measure experimentally, such as x-ray doses to the breast and x-ray scatter. The x-ray spectra need to be validated. Usually the validation of Monte Carlo calculation codes is performed by doing a simulation which reproduces an actual experiment and comparing the results to the experimental data. We calculate 5-25 keV x-ray spectra emitted from different target materials using the general-purpose EGSnrc BEAM code with two different Electron Impact Ionization cross sections, one developed by Ivan Kawrakow and another developed by Salvat and referred as Penelope cross section. They are compared to the existing experimental data and a preference for the Penelope cross section is found.

2. "The global need for radiation therapy"

Miller MacPherson - The Ottawa Hospital Cancer Centre

Abstract: In the developing world, cancer now kills more people than HIV, malaria, and tuberculosis combined. By 2035, 70% of all cancers will occur in low and middle income countries (LMICs).  Strong efforts are underway on prevention and screening to mitigate this trend, but investments in treatment infrastructure are also needed as not all cancers can be prevented.  It has been established that more than half of all cancer patients should have radiation therapy at some point during the course of their care.  Unfortunately, the burden of cancer is rising fastest in jurisdictions that have little or no access to radiation therapy.  This talk will describe the global cancer landscape, recent efforts to address the gap at local levels, and focus on a Canadian-led initiative to elevate the need for radiation therapy to the global health policy arena.