IMRT Course 2016

Zero Margins in daily online ART/IGRT? Intrafraction motion: prostate

D. Skarsgard et al. 2010: Planning target volume margins for prostate radiotherapy using daily electronic portal imaging and implanted fiducial markers. Radiat Oncol. 5:52

RESULTS: Without image guidance, margins of 0.57 cm, 0.79 cm and 0.77 cm, along the left-right, superior-inferior and anterior-posterior axes respectively, are required to give 95% probability of complete CTV coverage each day. With the above image guidance strategy, these margins can be reduced to 0.36 cm, 0.37 cm and 0.37 cm respectively. Correction of all isocenter placement errors, regardless of size, would permit minimal additional reduction in margins.

ESTRO IMRT course 2016 Adaptive Radiotherapy London April 7th, 2016

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