ABSTRACT
This chapter describes a two-dimensional (2D) reference dosimetry protocol for dose measurements during diagnostic radiology procedures with the GafChromic XR-QA film model. The use of radiochromic film provides a 2D dosimetry with high spatial resolution superior to point dose measurement detectors. The chapter presents clinical applications, as well as several quality assurance applications of XR-QA film models. It provides a reference radiochromic film-based dosimetry protocol developed for diagnostic radiology beam qualities. The response of the XR-QA model radiochromic film reference dosimetry system is the most conveniently calibrated as a function of air kerma in air. The most apparent clinical application of radiochromic film would be a measurement of the surface dose for patients undergoing imaging procedures. The XR-QA model GafChromic film has been used for surface dose measurements on patients during computed tomography diagnostic as well as image-guided radiation therapy cone beam computed tomography imaging procedures.
