Determination of dose profile data with film dosimetry

Almost all external radiotherapy planning systems use dose profile data. There are various methods to measure these profiles. Direct measurements with semiconductor detectors are widely used. But this method takes lots of time especially at linear accelerators. We developed a simple method for this purpose. Dose profiles are measured using radiographic films and verification films. Suitable modifications are done with derived sensitometric curves. Results are compared with original profiles. For the /sup 60/Co, this method is found as an alternative to other methods with acceptable accuracy (% /spl plusmn/2).