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Introduction: The AQURE is a recently designed mobile linear accelerator for intraoperative electron radiotherapy (IOERT). In the study, we assess, report, and compare the dosimetric characteristics obtained during the commissioning of this machine in our Centre. Material and Methods: The electron energies of the AQURE used in this study are 4, 6, 9 and 12 MeV. The diameters of the cylindrically shaped applicators range from 4 to 10 cm. The measurements were performed (a) by microDiamond detector in a BeamScan water phantom (depth dose distributions, flatness and symmetry of dose profiles, output constancy and linearity) and (b) by Farmer ionisation chamber in a solid water phantom (output related to gantry angle). The results of measurements were compared to analogous results from other IOERT accelerators and were evaluated in the light of scientific recommendations and legal regulations. Results: The values of the measured parameters fit the recommended ranges. The profiles and the depth dose distributions are close to literature data for other IOERT machines. Any differences between them are caused by the detailed technical solutions which influence the final shape of the obtained dose distributions. The values of mean and most probable energies suggest that the electron beams used during IOERT cannot be considered mono-energetic. We believe that the energy spectrum should be researched and described for each IOERT mobile accelerator before clinical usage. Conclusion: The measurements confirm the dosimetric accuracy of the AQURE accelerator under the literature guidelines.
Słowa kluczowe
Rocznik
Tom
Strony
177--181
Opis fizyczny
Bibliogr. 15 poz., rys., tab.
Twórcy
autor
- Department of Electroradiology, Poznan University of Medical Sciences, Poznan, Poland
autor
- Department of Medical Physics, Greater Poland Cancer Centre, Poznan, Poland
autor
- Department of Electroradiology, Poznan University of Medical Sciences, Poznan, Poland
- Department of Medical Physics, Greater Poland Cancer Centre, Poznan, Poland
autor
- National Centre for Nuclear Research, Otwock, Poland
- National Centre for Nuclear Research, Otwock, Poland
autor
- Department of Medical Physics, Greater Poland Cancer Centre, Poznan, Poland
autor
- Department of Medical Physics, Greater Poland Cancer Centre, Poznan, Poland
autor
- National Centre for Nuclear Research, Otwock, Poland
autor
- Department of Electroradiology, Poznan University of Medical Sciences, Poznan, Poland
- Department of Medical Physics, Greater Poland Cancer Centre, Poznan, Poland
- Department of Biomedical Physics, Adam Mickiewicz University in Poznan, Poznan, Poland
Bibliografia
- 1. Willett CG, Czito BG, Tyler DS. Intraoperative radiation therapy. J Clin Oncol Off J Am Soc Clin Oncol. 2007;25(8):971-977. https://doi.org/10.1200/JCO.2006.10.0255
- 2. Meurk ML, Goer DA, Spalek G, Cook T. The Mobetron: a new concept for IORT. Front Radiat Ther Oncol. 1997;31:65-70. https://doi.org/10.1159/000061147
- 3. Winkler P, Odreitz-Stark S, Haas E, Thalhammer M, Partl R. Commissioning, dosimetric characterization and machine performance assessment of the LIAC HWL mobile accelerator for Intraoperative Radiotherapy. Z Med Phys. 2020;30(4):279-288. https://doi.org/10.1016/j.zemedi.2020.06.004
- 4. Adrich P, Baczewski A, Baran M, Drabik W, Gryn K, Hanke R, et al. A new mobile electron accelerator for intraoperative electron radiation therapy. Int J Mod Phys Conf Ser. 2014;1(27):1460125. https://doi.org/10.1142/S2010194514601252
- 5. Dróżdż A, Waluś M, Zieliński M, Malesa B, Kruszyna-Mochalska M, Kulcenty K, et al. Verification of electron beam parameters in an intraoperative linear accelerator using dosimetric and radiobiological response methods. Rep Pract Oncol Radiother. 2021;26(6):1029-1034. https://doi.org/10.5603/RPOR.a2021.0128
- 6. Misiarz A, Lenartowicz A, Adrich P, et al. Design and performance validation of a novel 3d printed thin-walled and transparent electron beam applicators for intraoperative radiation therapy with beam energy up to 12 MeV. Rep Pract Oncol Radiother. 2024;29(3):329-339. https://doi.org/10.5603/rpor.101092.
- 7. Das IJ, Cheng CW, Watts RJ, Ahnesjö A, Gibbons J, Li XA, et al. Accelerator beam data commissioning equipment and procedures: Report of the TG–106 of the Therapy Physics Committee of the AAPM. Med Phys. 2008;35:4186-4215. https://doi.org/10.1118/1.2969070
- 8. Polish Legal Act: Rozporządzenie Ministra Zdrowia z dnia 12 grudnia 2022 r. w sprawie testów eksploatacyjnych urządzeń radiologicznych i urządzeń pomocniczych. Dziennik Ustaw Rzeczypospolitej Polskiej, 27 grudnia 2022, Poz. 2759.
- 9. Kruszyna-Mochalska M, Bijok M, Pawałowski B, Misiarz A, Kosiński K, Pracz J, et al. Zalecenia Polskiego Towarzystwa Fizyki Medycznej dotyczące kontroli jakości w radioterapii ś ródoperacyjnej promieniowaniem elektronowym (IOERT) za pomocą mobilnych akceleratorów. Inż i Fiz Med . 2019;8(1):7-25.
- 10. Beddar AS, Biggs PJ, Chang S, Ezzell GA, Faddegon BA, Hensley FW, et al. Intraoperative radiation therapy using mobile electron linear accelerators: report of AAPM Radiation Therapy Committee Task Group No. 72. Med Phys. 2006;33(5):1476-89. https://doi.org/10.1118/1.2194447
- 11. Istituto Superiori di Sanità (Ed. Rosi A and Viti V). Guidelines for quality assurance in intra-operative radiation therapy. Oncología (Barc.). 2004;27(7); https://doi.org/10.4321/S0378-48352004000700013
- 12. Wootton LS, Meyer J, Kim E, Phillips M. Commissioning, clinical implementation, and performance of the Mobetron 2000 for intraoperative radiation therapy. J Appl Clin Med Phys. 2017;18(1):230-242. https://doi.org/10.1002/acm2.12027
- 13. McLaughlin DJ, Hogstrom KR, Neck DW, Gibbons JP. Comparison of measured electron energy spectra for six matched, radiotherapy accelerators. J Appl Clin Med Phys. 2018;19(3):183-192. https://doi.org/10.1002/acm2.12317
- 14. Deasy JO, Almond PR, McEllistrem MT, Ross CK. A simple magnetic spectrometer for radiotherapy electron beams. Med Phys. 1994;21(11):1703-1714. https://doi.org/10.1118/1.597271
- 15. Ryczkowski A, Piotrowski T, Staszczak M, Wiktorowicz M, Adrich P. Optimization of the regularization parameter in the Dual Annealing method used for the reconstruction of energy spectrum of electron beam generated by the AQURE mobile accelerator. Zeitschrift für Medizinische Physik. Published online April 2023. https://doi.org/10.1016/j.zemedi.2023.03.003
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Bibliografia
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bwmeta1.element.baztech-7ec4456e-4d70-4ca7-a131-1220360188c7
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