The GAFCHROMIC® RTQA2 self-developing radiochromic QA films are for faster, easier, more convenient, and less costly QA testing of radiotherapy sources and the commissioning of therapy equipment. Specifically designed for LINAC / accelerator machine QA such as light field / radiation field alignment tests, precision star shots; also position verification for HDR, and autoradiography of implantable seeds, plaques and other sources.