Evaluation of SRS MapCHECK with StereoPHAN phantom as a new pre-treatment system verification for SBRT plans

• Autorzy: Sadowski Bartłomiej Mieszko , Fillmann Marta , Szałkowski Dariusz , Kukołowicz Paweł

Identyfikatory

DOI

10.2478/pjmpe-2022-0010

• Języki publikacji: EN

Abstrakty

EN

Introduction: The aim of this study was to evaluate the new 2-Dimensional diode array SRS MapCHECK (SunNuclear, Melbourne, USA) with dedicated phantom StereoPHAN (SunNuclear, Melbourne, USA) for the pre-treatment verification of the stereotactic body radiotherapy (SBRT). Material and methods: For the system, the short and mid-long stability, dose linearity with MU, angular dependence, and field size dependence (ratio of relative output factor) were measured. The results of verification for 15 pre-treatment cancer patients (5 brains, 5 lungs, and 5 livers) performed with SRS MapCHECK and EBT3 Gafchromic films were compared. All the SBRT plans were optimized with the Eclipse (v. 15.6, Varian, Palo Alto, USA) treatment planning system (TPS) using the Acuros XB (Varian, Palo Alto, USA) dose calculation algorithm and were delivered to the Varian EDGE® (Varian, Palo Alto, USA) accelerator equipped with a high-definition multileaf collimator. The 6MV flattening-filter-free beam (FFF) was used. Results: Short and mid-long stability of SRS MapCHECK was very good (0.1%-0.2%), dose linearity with MU and dependence of the response of the detector on field size results were also acceptable (for dose linearity R2 = 1 and 6% difference between microDiamond and SRS MapCHECK response for the smallest field of 1 × 1 cm2). The angular dependence was very good except for the angles close to 90° and 270°. For pre-treatment plan verification, the gamma method was used with the criteria of 3% dose difference and 3 mm distance to agreement (3%/3 mm), and 2%/2 mm, 1%/1 mm, 3%/1 mm, and 2%/1 mm. The highest passing rate for all criteria was observed on the SRS MapCHECK system. Conclusions: It is concluded that SRS MapCHECK with StereoPHAN has sufficient potential for pre-treatment verification of the SBRT plans, so that verification of stereotactic plans can be significantly accelerated.

Słowa kluczowe

EN

dosimetry; quality assurance; stereotactic radiotherapy

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2022
• Tom: Vol. 28, Iss. 2
• Strony: 84--89
• Opis fizyczny: Bibliogr. 14 poz., rys., tab.

Twórcy

autor

Sadowski Bartłomiej Mieszko

• Department of Medical Physics, The Maria Sklodowska-Curie National Research Institute of Oncology, Poland

autor

Fillmann Marta

• Department of Medical Physics, The Maria Sklodowska-Curie National Research Institute of Oncology, Poland

autor

Szałkowski Dariusz

• Department of Medical Physics, The Maria Sklodowska-Curie National Research Institute of Oncology, Poland

autor

Kukołowicz Paweł

• Department of Medical Physics, The Maria Sklodowska-Curie National Research Institute of Oncology, Poland

Bibliografia

• 1. Gopinath M, Senthilkumar S, Ahamed BPM, et al. Point dose verification of Cranial Stereotactic Radiosurgery using micro Ionization Chamber and EBT3 film for 6MV FF and FFF beams in Varian TrueBeam® LINAC. Polish Journal of Medical Physics and Engineering. 2020;26(3): 135-142. https://doi.org/10.2478/pjmpe-2020-0015
• 2. Xiao Y, Kry SF, Popple R, et al. Flattening filter-free accelerators: a report from the AAPM Therapy Emerging Technology Assessment Work Group. Journal of Applied Clinical Medical Physics. 2015;16(3):12-29. https://doi.org/10.1120/jacmp.v16i3.5219
• 3. Yan Y, Yadav P, Bassetti M, et al. Dosimetric differences in flattened and flattening filter-free beam treatment plans. J Med Phys. 2016;41(2):92-99. https://doi.org//10.4103/0971-6203.181636
• 4. Taylor ML, Kron T, Franich RD. A contemporary review of stereotactic radiotherapy: Inherent dosimetric complexities and the potential for detriment. Acta Oncologica. 2011;50(4):483-508. https://doi.org/10.3109/0284186X.2010.551665
• 5. Solberg TD, Balter JM, Benedict SH, et al. Quality and safety considerations in stereotactic radiosurgery and stereotactic body radiation therapy: Executive summary. Practical Radiation Oncology. 2012;2(1):2-9. https://doi.org/10.1016/j.prro.2011.06.014
• 6 Marroquin EYL, Herrera González JA, Camacho López MA, et al. Evaluation of the uncertainty in an EBT3 film dosimetry system utilizing net optical density. Journal of Applied Clinical Medical Physics. 2016;17:466-481. https://doi.org/10.1120/jacmp.v17i5.6262
• 7. Wen N, Lu S, Kim J, et al. Precise film dosimetry for stereotactic radiosurgery and stereotactic body radiotherapy quality assurance using Gafchromic™ EBT3 films. Radiat Oncol. 2016;11:132. https://doi.org/10.1186/s13014-016-0709-4
• 8. SRS MapCHECKTM User Guide. Model 1179
• 9. Ahmed S, Zhang G, Moros EG, Feygelman V. Comprehensive evaluation of the high‐resolution diode array for SRS dosimetry. Journal of Applied Clinical Medical Physics. 2019;20(10):13-23. https://doi.org/10.1002/acm2.12696
• 10. Lewis D, Micke A, Yu X, Chan MF. An efficient protocol for radiochromic film dosimetry combining calibration and measurement in a single scan. 2012;39(10):6339-6350. https://doi.org/10.1118/1.4754797
• 11. Winiecki J, Morgaś T, Majewska K, Drzewiecka B. The gamma evaluation method as a routine QA procedure of IMRT. Reports of Practical Oncology & Radiotherapy. 2009;14(5):162-168. https://doi.org/10.1016/S1507-1367(10)60031-4
• 12. IAEA. Dosimetry of Small Static Fields Used in External Beam Radiotherapy. An International Code of Practice for Reference and Relative Dose Determination. Vienna: International Atomic Energy Agency, Technical Reports Series No. 483; 2017
• 13. Jin H, Keeling VP, Johnson DA, Ahmad S. Interplay effect of angular dependence and calibration field size of MapCHECK 2 on RapidArc quality assurance. Journal of Applied Clinical Medical Physics. 2014;15(3):80-92. https://doi.org/10.1120/jacmp.v15i3.4638
• 14. Han Z, Ng SK, Bhagwat MS, Lyatskaya Y, Zygmanski P. Evaluation of MatriXX for IMRT and VMAT dose verifications in peripheral dose regions. Medical Physics. 2010;37(7Part1):3704-3714. https://doi.org/10.1118/1.3455707

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).