Use of a high-resolution 2D diode array for electronic brachytherapy quality control

Abstract

Quality control in radiotherapy is essential to ensure treatment safety and accuracy. Our goal is to evaluate the efficacy of quality control of an electronic brachytherapy system, performed with a 2D diode array, and to propose new methods involving this tool. We have performed a variety of tests regarding system’s reproducibility, sensitivity and stability, and computed the gamma index and gamma pass rate to compare dose distributions. We have been able to determine our array’s resolution both in position and dose (at least 1 mm and 1%, respectively), and presented strategies to perform an electronic brachytherapy system’s quality control implementing this device