Master of Science - Research
School of Physics
Radiotherapy requires quality assurance of patient radiation dose delivery. Gafchromic® radiochromic film is used as a dosimeter to validate these deliveries. This research explores Histogram Correlation as a calibration tool for Gafchromic® radiochromic film in verification of dose, for both magnitude and spatial distribution. This led to the development of a practical method for the use of Gafchromic® radiochromic film for use in Radiotherapy IMRT QA. The basis of this method is that a derived function of the scan data [(Blank/Exposed)-1] is directly proportional to the dose the film has been exposed to. This allows calibration by the definition of only one parameter, the constant of proportionality.
Bennie, Nick, Novel radiation dose calibration methods for Gafchromic film: Exploring Histogram Correlation and Linearisation, Master of Science - Research thesis, School of Physics, University of Wollongong, 2017. https://ro.uow.edu.au/theses1/56