%0 Journal Article %A Duma, Marciana Nona %A Borm, Kai %A Hehr, Thomas %A Piroth, Marc D %A Gerd, Fastner %A Baumann, René %A Combs, Stephanie E %A Corradini, Stefanie %A Dunst, Jürgen %A Krug, David %A Hörner-Rieber, Juliane %A Matuschek, Christiane %A Schmeel, Leonard Christopher %A Fietkau, Rainer %A Strnad, Vratislav %A Budach, Wilfried %T Regional nodal irradiation in breast cancer patients: A treatment planning study of the breast cancer working group of the German society of radiation oncology. %J Medical dosimetry %V nn %@ 0958-3947 %C Amsterdam [u.a.] %I Elsevier Science %M DKFZ-2025-02241 %P nn %D 2025 %Z epub %X The aim of the study was to analyze the interinstitutional differences in the planning process/approach of regional nodal irradiation (RNI) in breast cancer patients in expert centres. Based on a predefined risk constellation, the left breast and the axillary, periclavicular and internal mammarian lymph node areas had to be irradiated. The study focused on left-sided RNI. One CT dataset (free breathing) each of a regular (R) adipose (A) and a slender patient (S) were centrally selected and all target volumes (CTV: level II, III, IV + internal mammary artery chain region-IMC, left breast, PTV and OARs) were contoured according to the ESTRO recommendations. A total dose of 50.4/1.8 Gy was set as the dosage with free choice of technique/inclinic constraints. Dose files were analyzed centrally as DICOM files (CTV: D95 %K Breast cancer (Other) %K Lymphatics (Other) %K RNI (Other) %F PUB:(DE-HGF)16 %9 Journal Article %$ pmid:41168045 %R 10.1016/j.meddos.2025.09.006 %U https://inrepo02.dkfz.de/record/305582