Validation of an ultrasound-guided prostate HDR brachytherapy dose delivery

As part of a recent commissioning process for an ultrasound-guided prostate HDR technique at our centre, a representative dose delivery was validated using Gafchromic EBT3 film dosimetry. Agreement between Oncentra Prostate-calculated plan dose and measured film dose was within 5-10% over most of the 2D film dose planes, except in the regions within 5 mm of the catheter axes. Given the uncertainties associated with the measurement, this result was deemed to be clinically acceptable.