Comparison between radiochromic film and Sun nuclear edge diode detector during the commissioning of small field size radiosurgery cones
DOI:
https://doi.org/10.15392/bjrs.v10i2A.2025Keywords:
radiosurgery, comissioning, circular collimators, radiochromic film, diodeAbstract
Stereotactic Radiosurgery (SRS) is a procedure that uses ionizing radiation in a single fraction or few fractions to treat intracranial lesions. Usually, for these treatments, small photon fields, formed by circular collimators or micro multileaf collimators are used. The objective of the present work is to compare the measurements of the dose in depth (PDD), the off-axis ratio (OAR), and the output factor (OF) using Edge diode and radiochromic films and analyzing the agreement between the two detectors during these measures. In the gamma index analysis of the profiles, the minimum percentage reached was 98.3% of the points in the criterion 1% and 0.5 mm. The maximum percentage difference in the output factor was 2.79% for a cone 4 mm and 10FFF. In the gamma index analysis of the PDDs, the minimum percentage reached was 97% of the points in the criterion 1% and 1mm. The results show a good agreement between the edge detector and the film in small field measurements for radiosurgery.
Downloads
References
KHAN, Faiz M. The physics of radiation therapy. [S. l.]: Lippincott Williams & Wilkins, 2014
- YOUNGE, Kelly C. et al. The impact of a high-definition multileaf collimator for spine SBRT. Journal of Applied Clinical Medical Physics, [s. l.], v. 18, n. 6, p. 97–103, 2017 DOI: https://doi.org/10.1002/acm2.12197
- VENENCIA, C et al. SU-E-T-122: Dosimetric Comparison Between Cone, HDMLC and Mi-croMLC for the Treatment of Trigeminal Neuralgia. Medical Physics, [s. l.], 2014
- Pappas E, Maris TG, Zacharopoulou F, Papadakis A, Manolopoulos S, Green S, et al. Small SRS photon field profile dosimetry performed using a PinPoint air ion chamber, a diamond detector, a novel silicon-diode array (DOSI), and polymer gel dosimetry Analysis and intercomparison. Med Phys 2008;35(10):4640–8. https:// doi.org/10.1118/1.2977829. DOI: https://doi.org/10.1118/1.2977829
- Devic S, Tomic N, Lewis D. Reference radiochromic film dosimetry: Review of technical as-pects. Phys Medica 2016;32(4):541–56 DOI: https://doi.org/10.1016/j.ejmp.2016.02.008
- IAEA, AAPM. Dosimetry of small fields used in external beam radiotherapy. International Atomic Energy Agency Technical Report Series 483; 2017.
- Niroomand-Rad, A., Chiu-Tsao, S. T., Grams, M. P., Lewis, D. F., Soares, C. G., Van Battum, L. J., Das, I. J.,Trichter, S., Kissick, M. W., Massillon-JL, G., Alvarez, P. E., & Chan, M. F. (2020). Report of AAPM Task group 235 radiochromic film dosimetry: An update to TG-55. Medical Physics, 47(12), 5986-6025 DOI: https://doi.org/10.1002/mp.14497
- CHENG, Jason Y. et al. Output factor comparison of Monte Carlo and measurement for Varian TrueBeam 6 MV and 10 MV flattening filter-free stereotactic radiosurgery system. Journal of Applied Clinical Medical Physics, [s. l.], v. 17, n. 3, p. 100–110, 2016 DOI: https://doi.org/10.1120/jacmp.v17i3.5956
- GALVAN, J. Comisionamiento del sistema integrado de radiocirugía Varian ICVI. Master in Medical Physics, Universidad Nacional de Cuyo, Instituto Balseiro, 2017
Published
Issue
Section
Categories
License
Copyright (c) 2022 Brazilian Journal of Radiation Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing: The BJRS articles are licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
How to Cite
