Orest Ostapiak
Orest Ostapiak
Senior Physicist, Juravinski Cancer Centre; Associate Professor, McMaster University
Verified email at - Homepage
Cited by
Cited by
Refinements of the finite‐size pencil beam model of three‐dimensional photon dose calculation
OZ Ostapiak, Y Zhu, J Van Dyk
Medical Physics 24 (5), 743-750, 1997
Megavoltage imaging with low Z targets: Implementation and characterization of an investigational system
OZ Ostapiak, PF O'Brien, BA Faddegon
Medical Physics 25 (10), 1910-1918, 1998
An opposed matched field IMRT technique for prostate cancer patients with bilateral prosthetic hips
S Fattahi, OZ Ostapiak
Journal of Applied Clinical Medical Physics 13 (1), 44-57, 2012
Analysis of mechanical sources of patient alignment errors in radiation therapy
DR Wyman, OZ Ostapiak, LM Gamble
Medical physics 29 (11), 2698-2704, 2002
An evaluation of two approaches to skin bolus design for patients receiving radiotherapy for head and neck cancers
A Luu, L Doerwald-Munoz, O Ostapiak
Journal of Medical Imaging and Radiation Sciences 46 (3), S37-S42, 2015
Early results of a quality assurance program in a randomized trial of stereotactic body radiotherapy for stage I medically inoperable lung cancer
A Swaminath, M Wierzbicki, J Wright, T Tsakiridis, K Cline, C Bucci, ...
Assessment of Comfort and Shrinkage in Four Styles of Thermoplastic Masks
V Dovell, S Bhutto, L Doerwald-Munoz, O Ostapiak, G Sawesky
Journal of Medical Imaging and Radiation Sciences 45 (2), 168, 2014
Evaluation of the Role of Optical Surface Monitoring Systems in Aiding Pre-CBCT Setups for Head and Neck and Neurological Cancer Patients
S DiPietro, T VanSantvoort, O Ostapiak
Journal of Medical Imaging and Radiation Sciences 51 (3), S13-S14, 2020
Poster—Thur Eve—28: Optimization of a prostate cancer IGRT protocol
O Dona, K Diamond, O Ostapiak, M Wierzbicki
Medical Physics 39 (7Part3), 4629-4630, 2012
SU‐E‐T‐34: Time Series Analysis of Skin Reactions during Heck and Neck IMRT
D Glennie, L Doerwald‐Munoz, O Ostapiak, M Patterson, J Hayward, ...
Medical Physics 38 (6Part10), 3493-3493, 2011
SU‐E‐T‐82: Position‐Dependent Discrete Point Spread Functions for EPID IMRT QA
E Nichita, O Ostapiak, T Farrell
Medical Physics 38 (6Part11), 3504-3504, 2011
Sci—Thurs PM: Planning—03: The Effect of Small Cylindrical Air Cavities on Circumferential Dose Distributions Due to Small 6 MV Photon Fields
Y Poirier, O Ostapiak
Medical Physics 36 (9Part3), 4318-4318, 2009
321 Comparison of Patient-Specific Quality Assurance Results from a Deliver-Log Based Calculation System and Dose Reconstruction in Patient Anatomy Based on Phantom Measurements
G Chan, O Ostapiak, T Chow, B Liu, M Wierzbicki
Radiotherapy and Oncology 186, S136, 2023
A phase 2 study of stereotactic body radiation therapy for squamous cell carcinoma of the head and neck (SHINE): a single arm clinical trial protocol
J Lee, NT Nguyen, J Wright, KKD Yeung, S Sagar, DH Kim, O Ostapiak, ...
BMC cancer 23 (1), 379, 2023
The Canadian experience in commissioning a Halcyon-Linac in a Pinnacle-MOSAIQ based centre
R Vlad, O Ostapiak, R Studinski, K Diamond, M Shim, G Chan, R Hunter
MEDICAL PHYSICS 49 (8), 5692-5692, 2022
Determining Potential Benefits of Volumetric Image Matching in Radiation Therapy
S Aubert, O Ostapiak
Journal of Medical Imaging and Radiation Sciences 50 (2), S1-S2, 2019
13 Years of Clinical Trial Radiation Therapy Quality Assurance in Canada
O Ostapiak, WA Beckham, Y Lee, A Nichol, T Purdie
MEDICAL PHYSICS 46 (11), 5385-5385, 2019
The Evaluation of 4MV Volumetric Modulated Arc Therapy Treatment for Early Stage Laryngeal Cancer
J Ho, B Chean, O Ostapiak
Journal of Medical Imaging and Radiation Sciences 49 (2), 7, 2018
Determining the Effect of Gantry Rotation Limits on Plan Quality for Head and Neck Patients with Homo-lateral Disease
O Ostapiak, J Pinizzotto
Journal of medical imaging and radiation sciences 48 (1), S19, 2017
An Evaluation of Bolus Placement and its Effect on the Dose Distribution of Patients Receiving Radiotherapy for Head and Neck Cancers
J Kempt, O Ostapiak
Journal of Medical Imaging and Radiation Sciences 47 (1), S3, 2016
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