Research Masterclass in Radiotherapy Physics 2017

Additional problem: Range uncertainty

Small uncertainties in density may result in larger dose uncertainties as compared to MV photons

Oliver Jäkel

Medical Physics

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Initial Planning CT GTV 115 cc 5 weeks later GTV 39 cc Lung Tumor shrinkage during p-therapy

Beam stops at distal edge Beam overshoot

Courtesy of S. Mori, G. Chen, MGH, Boston

Oliver Jäkel Need for replanning and adaption during course of RT Medical Physics

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