316-317 / 1332
Organ Motion: Intrafraction
•
7 studies N= 92 patients
•
Cinematic-MRI, VB/MVCT and portal imaging before
and after each fraction.
•
Mean range of 0.1-3.0 mm.
•
Displacements greater than 5 mm occurred less than 3%
of the time
•
No predominance in direction
Heijkoop, Sabrina T., et al. "Quantification of intra-fraction changes during radiotherapy of cervical
cancer assessed with pre-and post-fraction Cone Beam CT scans."
Radiotherapy and Oncology
(2015).