We use GafchromicTM EBT3 films from Ashland which is specifically designed for applications in radiotherapy. This film features symmetrical construction and anti-Newton ring coatings for enhanced ease-of-use and accuracy.
Irradiation causes darkening of the film, the degree of which depends on the amount of radiation dose. The evaluation of the films is commonly expressed in terms of Optical Density (OD) change, which can be measured by a flatbed scanner.
We use an Epson® 10000XL scanner in combination with the FilmQATM Pro software.
D. Lewis, A. Micke, X. Yu, and M. F. Chan, ‘An efficient protocol for radiochromic film dosimetry combining calibration and measurement in a single scan’, Medical physics, vol. 39, no. 10, pp. 6339–6350, 2012.