LAUSR

e12092Background: The comparison of the radiation load to the organs at risk for three modes of radiation treatment of the breast cancer patients. Methods: The research includes the dosimetric radiation treatment plans for the 20 breast cancer patients with the left-side localization. They all underwent a computed tomography (CT) scan in standard supine position in free-breathing (FB), supine position with Active Breathing Control (ABC) device in deep inspiratory breath hold, and prone position in free-breathing (PP). Three-dimensional treatment plans were made for all 3 CTs. The dose valuations for 3D-planning were carried out for three CT- series. For each mode of radiation, the doze-volume parameters of organs at risk were estimated. Results: For all cases the contoured heart volume varied from 477 см3 - 1056 см3, with medium volume 769 см3. The best marks such as V25heart, medium doses to the heart and LAD, were achieved with on ABC methods (V25heart 4,26%, Dmean heart 3,13Gy, DmeanLAD 13,8Gy) in comp...