Dosimetric impact of intrafraction rotations in stereotactic prostate radiotherapy: A subset analysis of the TROG 15.01 SPARK trial

The use of ultra-hypofractionated, or SBRT, treatments of the prostate has gained in popularity in recent years [1 –3]. Due to the inherent dose per fraction escalation of these approaches, there is a need for high dose gradients to be employed with tighter than conventional margins. Along with the low number of fractions being used, this results in an increased need for high quality image guidance to be emplo yed to ensure accurate treatment delivery. While commonly used systems such as Cone Beam CT (CBCT) give reasonable image quality and a high level of positioning accuracy when used with implanted fiducial markers, they only provide a snapshot of the position of the prostate.
Source: Radiotherapy and Oncology - Category: Radiology Authors: Tags: Original Article Source Type: research