IMRT Course 2016

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

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

ESTRO IMRT course 2016

Adaptive Radiotherapy

London April 7th, 2016

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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.