1065 / 1542
With planned intervals – CBCT
Quantification of need for adaptive strategy
• CBCT at fraction 1, 6, 11, 16, 21, 26 and 31
• Dosimetric evaluation- deemed insufficient if when compared to planning
CT
•
V
95
PTV decreased more than 3%.
•
PTV
mean
decreased more than 1%.
•
V
107
body increased more than 5 cm
3
.
If atelectasis, adaptive
strategy was required in
70% of the cases.
Moller DS, Khalil AA, Knap MM, Hoffmann L: Adaptive radiotherapy of lung cancer patients
with pleural effusion or atelectasis.
Radiother Oncol
2014, 110(3):517-522.