Daily online contouring and re-planning versus translation-only correction in neurovascular-sparing magnetic resonance-guided radiotherapy for localized prostate cancer
Publication date
2022-10
Authors
Teunissen, F R
van der Voort van Zyp, Jochem R N
de Groot-van Breugel, Eline N
Verkooijen, Helena M
Wortel, Ruud C
de Boer, Johannes C J
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Advisors
Supervisors
Document Type
Article
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Abstract
Neurovascular bundle (NVB) and internal pudendal artery (IPA) sparing during magnetic resonance-guided radiotherapy (MRgRT) for prostate cancer aims for preservation of erectile function. Our present workflow involves daily online contouring and re-planning on a 1.5 T MR-linac, as alternative to conventional (rigid) translation-only corrections of the prostate. We compared planned dose for the NVB and IPA between strategies. Total planned dose was significantly lower with daily online contouring and re-planning for the NVB, but not for the IPA. For the NVB and IPA, the intrapatient difference between highest and lowest fraction dose was significantly smaller for the contouring and re-planning plans.
Keywords
Adapt-to-position, Adapt-to-shape, Localized prostate cancer, MR-Linac, MRgRT, Neurovascular-sparing, Radiation, Oncology, Radiology Nuclear Medicine and imaging, Journal Article
Citation
Teunissen, F R, van der Voort van Zyp, J R N, de Groot-van Breugel, E N, Verkooijen, H M, Wortel, R C & de Boer, J C J 2022, 'Daily online contouring and re-planning versus translation-only correction in neurovascular-sparing magnetic resonance-guided radiotherapy for localized prostate cancer', Physics and Imaging in Radiation Oncology, vol. 24, pp. 43-46. https://doi.org/10.1016/j.phro.2022.09.002