Using a Scanner to Measure Absorbed Doses with Radiochromic Film Dosimeters
Abstract
The article provides a sequence of steps for using RISØ calorimeters for calibration and subsequent use of B3 radiochromic film dosimeters (GEX corporation) and a scanner for measuring absorbed doses. Calibration was carried out with the help of electron beam accelerator in the range of absorbed doses of 3 – 40 kGy (measurement range of RISØ calorimeters).
In the course of the work, the following was carried out:
– calibration of B3 radiochromic dosimetry films using RISØ calorimeters;
– plotting a calibration curve for B3 radiochromic dosimetric films;
– calculation of approximation functions;
– development of a technique for using a flatbed scanner to measure absorbed doses;
– estimation of the measurement uncertainties of absorbed doses.
Accelerator operation parameters: scanning frequency of the accelerated electron beam – 5 Hz, pulse frequency – 120 Hz, electron energy – 5 MeV, electron beam current – 60 μA. The measurement error of the absorbed dose is 5.8 %.
Downloads
References
A. Miller, P. Hargittai, and A. Kovacs, Radiation Physics and Chemistry 57, 679–685 (2000), https://doi.org/10.1016/S0969-806X(99)00507-1.
S. Devic, J. Seuntjens, E. Sham, E. B. Podgorsak, C. R. Schmidtlein, A. S. Kirov, and C. G. Soares, Medical physics 32, 2245–2253 (2005), https://doi.org/10.1118/1.1929253.
International Organization for Standardization, ISO/ASTM 51631:2020 Practice for use of calorimetric dosimetry systems for dose measurements and dosimetry system calibration in electron beams, Standard (International Organization for Standardization, Geneva, CH, Feb. 2020).
P. Sharpe and A. Miller, National Physical Laboratory. NPL Rep. CIRM 29 (2009).
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
