IMRT SX1

Name (ID): WholeBrainHCS40, WholeBrainHCS40 (HCSWB40), (006002357)
Plan or PlanSum ID: 2D WB ETiSX1c

Due to the unflattened nature of the 6MV beam, traditional “2D” treatment techniques cannot be employed on most normal sized targets.  The inverse planning optimizer or the irregular suface comensator has to be employed to deliver a homogenous dose distribution to the target.  If using the Photon Optimizer a target volume is required.  In this case the brain contour was used as the target in the optimizer and both lateral beams were slightly rotated (3deg) anteriorly to create a non-divergent scenario with respect to the patient’s eyes.  Simple optimization objectives were created as follows:

PTV: 100%  30.7Gy p140; 0% 31.7Gy p150;

Body: 0% 32Gy p200

Lenses: 0% 4.5Gy p110

NTO: auto p75

Simple whole brain plan. No issues. This is a clinically acceptable plan.

_{Any reference to a "plan study" are simply what the organizers call each case and may not be a "study" in the FDA sense as they may not have been published in a peer reviewed journal.
Varian does not provide medical advice and these are illustrative examples only.
Leading plans by expert planner. Your results may vary.}