Desenvolvimento de software através do Pylinac para automatização da análise do Winston-Lutz em EPID e dos testes do isocentro radiativo
DOI:
https://doi.org/10.29384/rbfm.2021.v15.19849001642Keywords:
Garantia de qualidade; isocentro; Winston-Lutz; Star shot; software; python.Abstract
Stereotatic radiosurgery has been used increasingly beacuse it is a very precise technique for brain treatments, which a large amount of dose is deposited on the target volume. To be able to use this treatment technique it is recommended that the verification of the radiation isocentricity is checked When the technique will be performed. One of the tests that are used for this validation is the Winston-Lutz test, which is possible, athwart images, to identiy if the radiactive isocenter is within the tolerance limits established by equipment enabled to permor special techniques as radiosurgery. Beside this, Other tests can be done for this verification. One of them is the star shot model, in which, through diferente setup arrangements, it is possible to check the isocenters of the main accelerator components: Gantry, collimator, and couch. Although the analysis of the tests can be performed manually, there is a possibility of the user’s inflyence at the momento of analyses. The purpose of the paper were develop software though the Pylinac library so that the analyzes carried out by user are permorm with agility and independente operator, since it is an open source program with no comercial link, the acquisition is accessible to all users who execute the tests and analyses of the Winston-Lutz and star shot tests. However, to ensure the effectiveness and applicability of the software developed, it must validate with cammercially available software or with a comparison of the manual analyses of expert users in the area. The evaluation was performed for Winston-Lutz test using MyQA software and it was found an expressive statistical agreement between both of them.
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References
2. Leksell L (1951) The stereotaxic method and radiosurgery of the brain. Acta Chir Scand 102:316–319.
3. W. Lutz, K. Winston, and N. Maleki, "A system for stereotactic radiosurgery with a linear accelerator," International Journal of Radiation Oncology, pp. 373-381, 1988.
4. Paul B. Ravindran. A study of Winston-Lutz test on two different electronic portal imaging devices and with low energy imaging. Australas Phys Eng Sci Med. 2016. 39:677-685.
5. Tom Depuydt, Rudi Penne, et al. Computer-aided analysis of star shot films for high-accuracy radiation therapy treatment units. Physics in Medicine and Biology. 2012. 2997-3011.
6. A González, I. Castro, and J. A. Martínez. A procedure to determine the radiation isocenter size in a linear accelerator. Med. Phys. 2004. 31(6).
7. Liu Ke, Bian Xin, How Lixin, Zhou Xin. Study on Star Shot Analysis for Physics Quality Assurance in Radiotherapy. Applied Mechanics and Materials Vols. 541-542.
8. Guilherme Giacomini, Victor Augusto Bertotti Ribeiro. “Detecção automática do teste de Winston Lutz em filmes radiocrômicos”. Revista Brasileira de Física Médica, 2020, 14:515.
9. J. Kerns, "Pylinac Winston-Lutz module documentation," Pylinac, 2021. [Online]. Available: https://pylinac.readthedocs.io/en/stable/winston_lutz.html [Accessed 2, 2021].
10. J.Kerns, “Starshot module documentation”, Pylinac, 2021 [Online] Available: https://pylinac.readthedocs.io/en/stable/starshot_docs.html [Accessed 2,2021].
11. Klein et al.: Task Group 142 Report: QA of Medical Accelerators. Med. Phys. 36, 9, September 2009.
12. Michael P Banes, Pter B Greer. Evaluation of the truebeam machine performance check (MPC) geometric checks for daily IGRT geometric accuracy quality assurance. J. Appl. Clin. Med. Phys 2017; 18:3:200-206.
13. Koren Smith, Peter Balter, John Duhon, et al. AAPM Medical Physics Practice Guideline 8.a.: Linear Accelerator performance tests. J. Appl. Clin. Med. Phys 2017; 18:4:23-39.
14. Per. H. Halvorsen, Eileen Cirino, et al. AAPM-RSS Medical Physics Pratice Guideline 9.a. for SRS-SBRT. J Appl. Clin Med Phys 2017; 18:5:10-21.
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