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Imaging System and Radiation Isocenter Alignment
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External markers are first aligned with the room lasers before acquisition of
orthogonal portal images. The isocenter indicated from these portal images is
then compared with that obtained with that obtained with the volumetric
imaging system isocenter
1
1J Bissonnette, D Moseley, E White, M Sharpe, T Purdie, D Jaffray, Quality Assurance
for the Geometric Accuracy of Cone-Beam CT Guidance in Radiation Therapy. IJROBP,
Volume 71, Issue 1, Supplement, 2008, S57–S61