L0_2016_Athens_Physics_Programme_V6

2790-2791 / 3107

With planned intervals - CBCT
Quantification of need for adaptive strategy
• CBCT at fraction 1, 6, 11, 16, 21, 26 and 31 (of 33 Fx)
• Dosimetric evaluation
• V95PTV decreased more than 3%.
• PTVmean decreased more than 1%.
• V107body increased more than 5 cm3 .
Møller et al, RadOnc110 (2014) 517–522
If atelectasis, adaptive
strategy was required in
70% of the cases.