Comparison of Patient-Specific Quality Assurance Devices in Radiation Therapy

Abstract

This study aimed to compare the results of patient-specific quality assurance (PSQA) between MapCHECK and Octavius for radiation therapy. A total of 50 patients with passing PSQA results were included. The point dose difference (DD) and gamma passing rate (GPR) were analyzed to evaluate the agreement between the measured and planned data, and the PSQA results from the two quality assurance (QA) devices were compared for all cases. The DDs and GPRs were within the tolerance ranges in all of the cases. The average GPR difference between the two detectors was statistically significant for the brain and the H&N values for the gamma criteria were 3%/3 mm, 2%/2 mm, and 1%/1 mm. These PSQA systems can be used interchangeably for routine PSQA during the delivery of radiation therapy.