In vivo dosimetry
In vivo dosimetry is an essential tool in quality-assurance programs. It is important to check the dose delivered to patients undergoing radiation treatment to avoid over or underdosing in areas in which assurance of planning accuracy may be needed. Radiochromic films are uniquely able to measure not only point doses but also two-dimensional maps of applied doses in vivo to a patient. In this section, we will briefly discuss the qualities of an ideal dosimeter and some of the processes and typical applications of radiochromic films to in vivo dosimetry techniques.