Abstract

The Intrabeam is a mobile intraoperative radiotherapy system that can be used to treat selected breast cancer patients with a highly localised dose of radiation (50 kV). The commissioning project involved verifying the key dosimetric parameters of the Intrabeam including (A) absorbed dose, (B) percentage depth dose and (C) dose distribution. The absolute dose determined for all applicators at a clinically relevant depth (5 mm in water) satisfied a distance to agreement criteria of 1 mm (i.e. the dose fall off is approximately 12% per mm at 5 mm depth, and agreement with the calibration files was within 12%). Excellent agreement (

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