Validation of quality assurance procedures using a portal device
DOI:
https://doi.org/10.37004/sefm/2022.23.2.001Keywords:
Quality assurance, linac, EPID, portal dosimetryAbstract
The use of portal flat panels for MV can simplify the quality assurance of the equipment and enables to carry out more tests without increasing measurement time. On the other hand, these methodologies are not the ones recommended for dose measurement, so a strict validation process must be carried out before trusting on them. In this work, a set of validation tests and a series of quality assurance procedures, are explained.
References
Luchka K, Chen D, Shalev S, Gluhchev G, Rajapakshe R. Assessing radiation and light field congruence with a video based electronic portal imaging device. Med Phys. 1996;23(7):1245-52. doi:10.1118/1.597867
Meertens H, Van Herk M, Weeda J. A liquid ionisation detector for digital radiography of therapeutic megavoltage photon beams. Phys Med Biol. 1985;30(4):313-21. doi:10.1088/0031-9155/30/4/004
Herman MG, Balter JM, Jaffray DA, et al. Clinical use of electronic portal imaging: Report of AAPM Radiation Therapy Committee Task Group 58. Med Phys. 2001;28(5):712-37. doi:10.1118/1.1368128
Budgell GJ, Zhang R, Mackay RI. Daily monitoring of linear accelerator beam parameters using an amorphous silicon EPID. Phys Med Biol. 2007;52(6): 1721-33. doi:10.1088/0031-9155/52/6/012
Sun B, Goddu SM, Yaddanapudi S, et al. Daily QA of linear accelerators using only EPID and OBI. Med Phys. 2015;42(10):5584-94. doi:10.1118/1.4929550
Lizuain M, Capuz A, Delgado J, et al. Recomendaciones para el control de calidad de equipos y técnicas de radioterapia guiada por la imagen (IGRT). In: Ma Cruz Lizuain Arroyo, ed. ADI; 2013:345.
European Council Directive 2013/59/Euratom on basic safety standards for protection against the dangers arising from exposure to ionising radiation and repealing Directives 89/618/Euratom, 90/641/Euratom, 96/29/Euratom, 97/43/Euratom and 2003/122/Euratom. Published online 2014:57:1–73.
Klein EE, Hanley J, Bayouth J, et al. Task group 142 report: Quality assurance of medical accelerators. Med Phys. 2009;36(9):4197-212. doi:10.1118/1.3190392
Mutic S, Pawlicki T. EPID-based daily quality assurance of linear accelerators will likely replace other methods within the next ten years. Med Phys.2016;43(6):2691-3. doi:10.1118/1.4944423
Musolino S V. Absorbed Dose Determination in External Beam Radiotherapy: An International Code of Practice for Dosimetry Based on Standards of Absorbed Dose to Water; Technical Reports Series No. 398,. Vol 81. Ovid Technologies (Wolters Kluwer Health); 2001. doi:10.1097/00004032-200111000-00017
van Elmpt W, McDermott L, Nijsten S, Wendling M, Lambin P, Mijnheer B. A literature review of electronic portal imaging for radiotherapy dosimetry. Radiother Oncol. 2008;88(3):289-309. doi:10.1016/J.RADONC.2008.07.008
Eckhause T, Al-Hallaq H, Ritter T, et al. Automating linear accelerator quality assurance. Med Phys. 2015;42(10):6074-83. doi:10.1118/1.4931415
Clivio A, Vanetti E, Rose S, et al. Evaluation of the Machine Performance Check application for TrueBeam Linac. Radiat Oncol. 2015;10(1):0-11. doi:10.1186/s13014-015-0381-0
Mans A, Remeijer P, Olaciregui-Ruiz I, et al. 3D Dosimetric verification of volumetric-modulated arc therapy by portal dosimetry. Radiother Oncol.2010;94(2):181-7. doi:10.1016/J.RADONC.2009.12.020
Bojechko C, Ford EC. Quantifying the performance of in vivo portal dosimetry in detecting four types of treatment parameter variations. Med Phys. 2015;42(12):6912-8. doi:10.1118/1.4935093
Sharma DS, Mhatre V, Heigrujam M, Talapatra K, Mallik S. Portal dosimetry for pretreatment verification of IMRT plan: a comparison with 2D ion chamber array. J Appl Clin Med Phys. 2010;11(4):238-48. doi:10.1120/JACMP.V11I4.3268
Fogliata A, Clivio A, Fenoglietto P, et al. Quality assurance of RapidArc in clinical practice using portal dosimetry. 2014;84(1002):534-45. doi:10.1259/BJR/72327299
Ripol Valentín O, Garcia Romero A, Hernández Vitoria A, et al. Caracterización dosimétrica de un dispositivo electrónico de imagen portal ( EPID ) y desarrollo de un modelo simple de dosimetría portal Dosimetric characterization of an electronic portal imaging device ( EPID ) and development of a portal dosimetry sim. Rev Física Médica. 2010;11(3):199-210.
Zaila A, Adili M, Bamajboor S. Pylinac: A toolkit for performing TG-142 QA related tasks on linear accelerator. Phys Medica. 2016;32:292-3. doi:10.1016/J.EJMP.2016.07.122
Li H, Dong L, Zhang L, Yang JN, Gillin MT, Zhu XR. Toward a better understanding of the gamma index: Investigation of parameters with a surface-based distance method. Med Phys. 2011;38(12):6730. doi:10.1118/1.3659707
Winiecki J, Morgas ́ T, Majewska K, Drzewiecka B. The gamma evaluation method as a routine QA procedure of IMRT. Reports Pract Oncol Radiother. 2009;14(5):162-8. doi:10.1016/S1507-1367(10)60031-4
Low DA, Dempsey JF. Evaluation of the gamma dose distribution comparison method. Med Phys. 2003;30(9):2455-64. doi:10.1118/1.1598711
Pichandi A, Ganesh KM, Jerin A, Balaji K, Kilara G. Analysis of physical parameters and determination of inflection point for Flattening Filter Free beams in medical linear accelerator. Reports Pract Oncol Radiother. 2013;19(5):322-31. doi:10.1016/j.rpor.2014.01.004
Muralidhar KR, Komanduri K. SU-E-T-614: Derivation of Equations to Define Inflection Points and Its Analysis in Flattening Filter Free Photon Beams Based On the Principle of Polynomial function. Med Phys. 2014;41(6Part21):369-369. doi:10.1118/1.4888950
Choi MG, Law M, Yoon DK, et al. Simplified sigmoidal curve fitting for a 6 MV FFF photon beam of the Halcyon to determine the field size for beam commissioning and quality assurance. Radiat Oncol. 2020;15(1):1-9. doi:10.1186/s13014-020-01709-x
Pönisch F, Titt U, Vassiliev ON, Kry SF, Mohan R. Properties of unflattened photon beams shaped by a multileaf collimator. Med Phys. 2006;33(6):1738-46. doi:10.1118/1.2201149
Nath R, Biggs PJ, Bova FJ, et al. AAPM code of practice for radiotherapy accelerators: report of AAPM Radiation Therapy Task Group No. 45. Med Phys. 1994;21(7):1093-121. doi:10.1118/1.597398
Galiano E, Joly T, Wiebe F. Proposed definitions for isodose flatness and symmetry in clinical radiotherapy beams. Appl Radiat Isot. 2004;61(6):1361-6. doi:10.1016/j.apradiso.2004.03.100
Kouloulias VE, Poortmans P, Antypas C, Kappas C, Sandilos P. Field flatness and symmetry of photon beams: Review of the current recommendations. Technol Heal Care. 2003;11(4):283-8. doi:10.3233/thc-2003-11408
Winkler P, Hefner A, Georg D. Dose-response characteristics of an amorphous silicon EPID. Med Phys. 2005;32(10):3095-105. doi:10.1118/1.2040711