dosimetric comparison between xr-rv3 and ebt2 radiochromic film in megavoltage photon beams

Background: radiochromic film is used for radiation dose measurement, xrrv3 is used in fluoroscopy and ebt2 film in radiation therapy. the aim was to determine if the dosimetric properties of these two films are comparable in megavolt photon beams. materials and methods: comparison measurements included: calibration curves, heterogeneous phantom dose profiles, and nasopharynx dose distribution measurement. results: both film types required 24 hours to stabilize. their heterogeneous phantom dose profiles were similar, and their dose distributions for a nasopharynx treatment were within 3%/3mm. conclusion: dose distributions between both films showed good correlation and xrrv3 film can be used in radiotherapy for quality control checks.