2017 Imaging for Physicists Coursebook

QA of CBCT

Recommended reading: Commissioning experience with cone beam computed tomography for image-guided radiation therapy Lehmann et al. Journal of applied clinical physics 2007 Clinical use of electronic portal imaging: Report of AAPM Radiation Therapy Committee Task Group 58 AAPM Medical Physics Practice Guideline 2.a: Commissioning and quality assurance of X-ray–based image-guided radiotherapy systems

Alignment of kV and MV lines

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verify – isocenter 3D agreement verify registration and alignment process – Image quality • monitor image quality parameters – watch for degradation – Patient dose •

measure base value (surrogates: air dose, HVL) – monitor changes –

Catphan

Penta Guide