Gating and intrafraction drift correction on a 1.5 T MR-Linac: Clinical dosimetric benefits for upper abdominal tumors

Guus Grimbergen; Sara L Hackett; Fasco van Ommen; Astrid L H M W van Lier; Pim T S Borman; Lieke T C Meijers; Eline N de Groot-van Breugel; Johannes C J de Boer; Bas W Raaymakers; Martijn P W Intven; Gert J Meijer

doi:10.1016/j.radonc.2023.109932

Gating and intrafraction drift correction on a 1.5 T MR-Linac: Clinical dosimetric benefits for upper abdominal tumors

Radiother Oncol. 2023 Dec:189:109932. doi: 10.1016/j.radonc.2023.109932. Epub 2023 Sep 30.

Affiliations

¹ Department of Radiation Oncology, University Medical Center Utrecht, the Netherlands. Electronic address: [email protected].
² Department of Radiation Oncology, University Medical Center Utrecht, the Netherlands.

PMID: 37778533
DOI: 10.1016/j.radonc.2023.109932

Abstract

This work reports on the first seven patients treated with gating and baseline drift correction on the high-field MR-Linac system. Dosimetric analysis showed that the active motion management system improved congruence to the planned dose, efficiently mitigating detrimental effects of intrafraction motion in the upper abdomen.

Keywords: Gating; Intrafraction motion; MR-guided radiotherapy; Motion Management.

MeSH terms

Abdominal Neoplasms* / radiotherapy
Humans
Motion
Movement
Radiometry
Radiotherapy Planning, Computer-Assisted
Radiotherapy, Intensity-Modulated*