Stephen Steciw

Area of Study / Keywords

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About

Dr. Stephen Steciw is currently appointed as Associate Professor in the Department of Oncology in the Faculty of Medicine & Dentistry.

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Research

MR-Linac: Magnetic Interference
Real-time image-guided adaptive radiotherapy (RTIGAR) is being explored at the Cross Cancer Institute by coupling a 0.2 T biplanar permanent-magnet MRI to a linear accelerator. My research involves using finite element analysis and other specialized software to study the effects of the magnetic interference from the MRI system on the production of an x-ray beam intended for use in radiotherapy. I am also investigating passive and active shielding methods to eliminate the effects of this magnetic interference.

EPID Modeling and Dosimetry
My research interests also include dosimetric modeling of EPIDs for exit-beam and IMRT verification. Monte Carlo modeling, with the addition of lag and ghosting correction algorithms are being investigated to improve the dosimetric response derived from the EPID.

ONCOL 568 - Physics of Diagnostic Radiology

Rigorous development of the physics of x-ray production, interaction and detection in diagnostic radiology, including mammography and ultrasound. In-depth analysis of analog and digital systems in radiography and fluoroscopy is given. The description and design of computed tomographic systems as well as the associated reconstruction algorithms from single to multislice helical systems are studied. Prerequisites: ONCOL 550, 562.

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