Advanced Physics for Brachytherapy 2018

Source Strength Measurements

• All HDR 192 Ir sources can have RAKR measured by physicist

• Using PSDL traceably-calibrated equipment for RAKR measurement

• For the eBT sources, only the Axxent has direct traceability to PSDL

• INTRABEAM and esteya sources do not yet have direct traceability – physicist may use AAPM TG-61 calibration method if they know the electron scatter/absorber thickness and the HVL for their device