Film Dosimetry and Spatial Dose Distribution of Electron Beam

In radiation dosimetry there are numerous problems associated with the measurement of iso-dose curves and depth-dose distributions in high-gradient regions of beams using conventional measuring systems such as ionization chambers, semiconductors, thermo-luminescent detectors (TLDs), and radiographic films. Radiographic film serves several important functions in electron gun calibration, radiation therapy, and radiation protection. It can serve as a radiation detector, relative dosimeter, display device, and an archival medium. Film gives excellent 2D spatial resolution and, in a single exposure, provides information about the spatial distribution of radiation in the area of interest or the attenuation of radiation by objects. It is essential to consider the error of the fitting function as it should be minimized to better optimize the veracity of the film analysis.