Multiple case dosimetric evaluation of VMAT scalp irradiation using 3D milled bolus

Adequate dose homogeneity and full prescription dose delivery to the scalp still remains a dosimetric problem during scalp irradiation due to the anatomical shape of the cranium. Confounding variables such as gravity, the irregular and convex shape of the cranium, air gaps between scalp surface and commercial bolus, and potential inconsistencies in a 3D printed bolus can negatively impact the dose delivered to the scalp surface during scalp irradiation. The purpose of this retrospective case study was to implement the use of a 3D milled rigid bolus technique combined with volumetric modulated arc therapy (VMAT) treatment planning and evaluate the dosimetric efficacy in delivering dose to the surface of the scalp.

Source: Medical Dosimetry - May 12, 2021 Category: Radiology Authors: Zachary Casto, Michal Liu, Nishele Lenards, Ashley Hunzeker, Wesley Zoller, Dukagjin M Blakaj Source Type: research