Abstract
Quality assurance checks of HDR afterloader units required by NRC (part 35, subpart H) include source positioning accuracy of ±1 millimeter. Common techniques include use of calibrated gafchromic film or direct observation on a source position check ruler. The decayed source activity in the treatment computer must also be checked. The PTW’s microDiamond detector has a thickness of 1μm which may theoretically promote improved spatial resolution of source position. The present study aims to evaluate the efficacy of the microDiamond detector in producing accurate source position check QA and strength verification.
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