It is necessary to transfer the information obtained by the x-ray beam after it passes through the patient to a form that can be readily interpreted by the clinician. This is accomplished by recording the information on radiographic film. Radiographic films are used to provide a permanent record containing the maximum amount of diagnostic information that can be recorded.
Radiographs also allow re-examinations as required to assess healing, progression of disease, etc.
Film Base 2. Adhesive Coat 3. Blue dye is usually added to the base to slightly tint the film resulting in less eyestrain for the viewer. A thin adhesive coat insures uniform adhesion of the emulsion layer to the film base. The emulsion consists of a homogeneous mixture of gelatin that provides mechanical support for imbedded silver halide crystals, which are responsible for the radiographic image.