68 / 1224
IGRT/Frameless: rotational correction
•
40 patients, 66 Brain metastases
•
Treatment with
6-DOF
robotic couch
correction based on ET/NB IGRT
•
Retrospective simulation of
4-DOF
by
manipulation of CT-dataset in TPS,
omitting rotational correction
•
Paddick Conformity Index reduces
from
0.68 to 0.59
(6-DOF versus 4-DOF correction)
•
Loss of 5%
in prescription isodose
coverage
(80%).
50
TV
PI
PI
×
TV
PI
TV
6-DOF
4-DOF
Gevaert
et al.
Int J Radiat Oncol Biol Phys 2012
SBRT 2016 - D. Verellen