Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

PURPOSE: To introduce a methodology to perform dose measurements using Gafchromic films which can span several decades of dose levels. METHODS: The technique is based on a rescaling approach using different films irradiated at different dose levels. This is combined with a registration protocol correcting positioning and scaling factors for each film. The methodology is validated using TLD's for out-of-field doses. Furthermore, two examples are provided using the technique to characterize small sized radiosurgery cones and compared with measurements made with a pinpoint chamber. RESULTS: Excellent agreement with TLD, planning systems and measurement was found. The superior resolution of the film technique was apparent. CONCLUSIONS: The authors have introduced a new technique allowing users to quantify very low doses in conjunction with commissioning measurements. The use of film also provides 2D information on beam characteristics in high resolution measurements.

Original publication




Journal article


Med Phys

Publication Date





6443 - 6448


Algorithms, Data Compression, Equipment Design, Equipment Failure Analysis, Film Dosimetry, Radiation Dosage, Reproducibility of Results, Sensitivity and Specificity