[en] Independent quality audits, as part of comprehensive quality assurance programmes, are recognized to be an effective means of verifying the quality of radiation medicine practices. Quality audits include a range of types and levels of review; this article summarizes those provided by the IAEA, including auditing of dose levels delivered in radiation oncology clinics. The IAEA promotes the need for regular audits in radiation medicine, in the form of peer review missions by experts, and has developed comprehensive guidelines that can support the auditing process in all disciplines, namely radiation therapy, nuclear medicine and diagnostic radiology. It develops guidelines setting out the principles and criteria for good practice of the various components of the clinical service, followed by guidelines for the conducting of the audits.