Difference between planned and delivered radiotherapy dose to the internal mammary nodes in high-risk breast cancer patients.

ABSTRACT:

Background and purpose

Chest wall movement during radiotherapy can impact the delivered dose to the internal mammary nodes (IMN) in high-risk breast cancer patients. Using portal imaging and dose reconstruction we aimed to examine the delivered IMN dose coverage.

Material and methods

Cine MV images were recorded for 39 breast cancer patients treated with daily image-guided radiotherapy (IGRT) in deep-inspiration breath-hold (DIBH). On the final frame of each cine MV recording the chest wall was matched with the Digitally Reconstructed Radiograph (DRR) from the treatment plan. The geometrical chest wall error was determined in the imager-plane perpendicular to the cranio-caudal direction, rounded to integer millimeters, and binned. For each 1 mm bin, an isocenter-shifted trea

SUBMITTER: Molby Nielsen AW 

PROVIDER: S-EPMC10393587 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature