AbstractID: 6899 Title: Film Dosimetry System for Routine QA and IMRT QA Abstract New Film dosimetry software, OCF(One Click Film) dosimetry, for routine QA and the IMRT QA has been developed this program is a software based on the user friendly Graphic User Interface and has the capability to perform the IMRT QA as well as the conventional film dosimetry. The routine QA such as the symmetry of the beam, the radiation-light field congruence and the profile analysis can be performed with one click. The isodose distribution and three dimensional graphical display can also be done with one click. The correlation of the IMRT intensity map from the treatment planning system and the delivered IMRT field can be easily obtained with OCF dosimetry. Application test results of the OCF dosimetry system of the routine QA and the IMRT QA proves the usefulness of the OCF dosimetry system. Easy to use, quick, and accurate, OCF dosimetry is a practical film dosimetry software tool.