ABSTRACT
Film dosimetry provides unique opportunity to map 2D dose, thus saving significant amount of time. Small proton fields and pencil beams are considered a separate class in which dosimetry is even much more complex. Film orientation plays an important role in radiation dosimetry due to radiation interaction causing polymerization in Radiochromic film (RCF). Using RCF dosimetry the observations get lost due to linear energy transfer dependence. RCF can be used for complex dosimetry in proton beam, either to save time for commissioning beam data for depth and profiles or for small fields. RCF can be used to quantify dose in small fields with caution. In general, RCF can be exposed in two orientations, perpendicular and parallel. Due to cost associated with RCF film, perpendicular exposure requires a lot of film and not preferred. Radiographic films that create large perturbation in electron beam due to variation influence, RCF gives similar response when used in solid phantom.
