Figure 3.

(a) Illustration of a gantry −80°, couch isocenter −70° beam direction (Elekta coordinate system). (b) Unobstructed beam access range to the breast or lymph node targets exceeds 90° in the coronal plane (sector between dotted blue lines) and 180° in a near‐sagittal plane (indicated by a red line) at a couch isocenter rotation of ~|70°|. (c) and (d) Dose distributions and dose‐volume histograms (DVH) of a patient eligible for B+LNI using prone crawl radiotherapy (left images in [c]; dotted lines in [d]) or standard supine radiotherapy (right images in [c]; solid lines in [d]). PTV‐LNI = planning target volume for lymph node irradiation.