Report of AAPM Task Group 219 on independent calculation-based dose/MU verification for IMRT

Timothy C. Zhu, Sotiris Stathakis, Jennifer R. Clark, Wenzheng Feng, Dietmar Georg, Shannon M. Holmes, Stephen F. Kry, Chang Ming Charlie Ma, Moyed Miften, Dimitris Mihailidis, Jean M. Moran, Niko Papanikolaou, Bjorn Poppe, Ying Xiao

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Independent verification of the dose per monitor unit (MU) to deliver the prescribed dose to a patient has been a mainstay of radiation oncology quality assurance (QA). We discuss the role of secondary dose/MU calculation programs as part of a comprehensive QA program. This report provides guidelines on calculation-based dose/MU verification for intensity modulated radiation therapy (IMRT) or volumetric modulated arc therapy (VMAT) provided by various modalities. We provide a review of various algorithms for “independent/second check” of monitor unit calculations for IMRT/VMAT. The report makes recommendations on the clinical implementation of secondary dose/MU calculation programs; on commissioning and acceptance of various commercially available secondary dose/MU calculation programs; on benchmark QA and periodic QA; and on clinically reasonable action levels for agreement of secondary dose/MU calculation programs.

Original languageEnglish (US)
Pages (from-to)e808-e829
JournalMedical physics
Issue number10
StatePublished - Oct 2021

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging


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