Purpose In this study, procedures were developed to achieve efficient reversible conversion
of a clinical linear accelerator (LINAC) and deliver ultrahigh-dose-rate (UHDR) electron or
conventional beams to the treatment room isocenter for FLASH radiation therapy. Methods
and Materials The LINAC was converted to deliver UHDR beam within 20 minutes by
retracting the x-ray target from the beam's path, positioning the carousel on an empty port,
and selecting 10 MV photon beam energy in the treatment console. Dose rate surface and …