ABSTRACT
Audits are also frequently used by clinical trials administrators as part of the credential of radiotherapy centers for participation in specific trials. For clinical trials to produce valid results, the centers contributing to them need to be demonstrably capable of planning treatments that follow the trial protocol and delivering treatments that are dosimetrically and geometrically matched to their treatment plans. Radiochromic film has been successfully used in many postal audits by the Imaging and Radiation Oncology Core Houston Quality Assurance Center in the United States. If the audit is being completed on behalf of a third party, such as a clinical trials administering organization, then that organization should also be supplied with the result of the audit. Some audits require accurate dosimetry measurements, and therefore require the use of a film designed for dosimetry purposes, whereas other audits may permit the use of a film that is designed for qualitative evaluation.
