%0 Journal Article
%T Dosimetric Effects of a Commercial Breast Board Patient Support System
%A Eve Schodowski
%A Austin Wilkinson
%A Sadik Khuder
%A David Pearson
%J International Journal of Medical Physics,Clinical Engineering and Radiation Oncology
%P 1-11
%@ 2168-5444
%D 2022
%I Scientific Research Publishing
%R 10.4236/ijmpcero.2022.111001
%X Aim: In prone breast treatments, a carbon fiber support device resides under the contralateral breast. Tangent beams are designed to encompass the
treated breast and these often pass through the board at a shallow angle,
resulting in significant attenuation. Our planners account for this attenuation
by adding field-in-field dose to the deep part of the breast, through the board. Concern
was raised about how accurate the treatment delivery is when the inherent uncertainties of patientsĄŻ positions are accounted for. Furthermore, transmission measurements are usually
carried out perpendicular to the board, a non-clinical situation. The goal of this study is to
evaluate the dosimetric effect of the board and the robustness of the plan to positional uncertainty. Materials
and Methods: Twenty-two breast patients treated on a commercial
prone breast board between 2017 and 2020 were selected for this
retrospective study. To evaluate the boardĄŻs attenuation, we compared the plans with the board removed from
the dose calculation. To quantify the robustness of this technique, we moved the beam isocenter
with respect to the patient and board. Results: Our results showed that when the breast board is removed from
a plan which was designed to account
for the board attenuation, the average point dose increases by 7.48%, with a maximum of 22%. Comparing results with a
mixed Analysis of
%K Prone Breast Treatment
%K Breast Board
%K Attenuating Structure
%K Interfraction-al Set-Up
%K Patient Support System
%K Robustness
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=114170