Journal article
Consistency of small-field dosimetry, on and off axis, in beam-matched linacs used for stereotactic radiosurgery
Luis Munoz, Tomas Kron, Marco Petasecca, Joseph Bucci, Michael Jackson, Peter Metcalfe, Anatoly B Rosenfeld, Giordano Biasi
Journal of Applied Clinical Medical Physics | WILEY | Published : 2021
DOI: 10.1002/acm2.13160
Abstract
PURPOSE: Stereotactic radiosurgery (SRS) can be delivered with a standard linear accelerator (linac). At institutions having more than one linac, beam matching is common practice. In the literature, there are indications that machine central axis (CAX) matching for broad fields does not guarantee matching of small fields with side ≤2 cm. There is no indication on how matching for broad fields on axis translates to matching small fields off axis. These are of interest to multitarget single-isocenter (MTSI) SRS planning and the present work addresses that gap in the literature. METHODS: We used 6 MV flattening filter free (FFF) beams from four Elekta VersaHD® linacs equipped with an Agility™ m..
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