1. Calibration: Before using a film for dosimetry, it must be calibrated against a known radiation dose to create a dose-response curve. 2. Exposure: The film is placed in the radiation field, either within a phantom (a model of human tissue) or directly on the patient. 3. Development: For radiographic films, this step involves chemical processing. For radiochromic and Gafchromic films, this step is not required. 4. Analysis: The film is scanned and analyzed using software that interprets the optical density or color change to determine the radiation dose distribution.
