Movement assessment of breast and organ-at-risks using free-breathing, self-gating 4D magnetic resonance imaging workflow for breast cancer radiation therapy

Melanie Habatsch; Manuel Schneider; Martin Requardt; Sylvain Doussin

doi:10.1016/j.phro.2022.05.007

Movement assessment of breast and organ-at-risks using free-breathing, self-gating 4D magnetic resonance imaging workflow for breast cancer radiation therapy

Phys Imaging Radiat Oncol. 2022 May 14:22:111-114. doi: 10.1016/j.phro.2022.05.007. eCollection 2022 Apr.

Authors

Melanie Habatsch¹, Manuel Schneider¹, Martin Requardt¹, Sylvain Doussin¹

Affiliation

¹ Siemens Healthcare GmbH, Erlangen, Germany.

Abstract

Motion management is essential in treatment planning of radiotherapy for breast cancer. This study assessed the movement of organs-at-risk and the breast using 4D magnetic resonance imaging (MRI). A self-gating respiration-resolved radial 3D gradient echo sequence was used. Five healthy volunteers were imaged at 1.5 T during free-breathing in supine position making use of a breast board. Median distances between heart and chest wall in axial views were 2.4 cm (range: 1.5 cm) and 3.0 cm (range: 1.7 cm) for end-of-exhale and end-of-inhale. 4D-MRI allowed organ delineation and might be a promising addition to novel RT planning for breast cancer patients.

Keywords: 4D MRI; Breast MRI; Free-breathing; MR-in-RT; Self-gating MRI.