Feasibility study of individualized optimal positioning selection for left-sided whole breast radiotherapy: DIBH or prone.

Feasibility study of individualized optimal positioning selection for left-sided whole breast radiotherapy: DIBH or prone. J Appl Clin Med Phys. 2018 Feb 13;: Authors: Lin H, Liu T, Shi C, Petillion S, Kindts I, Weltens C, Depuydt T, Song Y, Saleh Z, Xu XG, Tang X Abstract The deep inspiration breath hold (DIBH) and prone (P) position are two common heart-sparing techniques for external-beam radiation treatment of left-sided breast cancer patients. Clinicians select the position that is deemed to be better for tissue sparing based on their experience. This approach, however, is not always optimum and consistent. In response to this, we develop a quantitative tool that predicts the optimal positioning for the sake of organs at risk (OAR) sparing. Sixteen left-sided breast cancer patients were considered in the study, each received CT scans in the supine free breathing, supine DIBH, and prone positions. Treatment plans were generated for all positions. A patient was classified as DIBH or P using two different criteria: if that position yielded (1) lower heart dose, or (2) lower weighted OAR dose. Ten anatomical features were extracted from each patient's data, followed by the principal component analysis. Sequential forward feature selection was implemented to identify features that give the best classification performance. Nine statistical models were then applied to predict the optimal positioning and were evaluated using stratified ...
Source: Journal of Applied Clinical Medical Physics - Category: Physics Authors: Tags: J Appl Clin Med Phys Source Type: research