지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Purpose: In this study, the accuracies of electron Monte Carlo (eMC) calculation algorithms were evaluated to determine whether electron beams were modeled by optional air profiles (APs) designed for each applicator size. Methods: Electron beams with the energies of 6, 9, 12, and 16 MeV for VitalBeam (Varian Medical System, Palo Alto, CA, USA) and 6, 9, 12, 16, and 20 MeV for Clinac iX (Varian Medical System) were used. Optional APs were measured at the source-to-detector distance of 95 cm with jaw openings appropriate for each machine, electron beam energy, and applicator size. The measured optional APs were postprocessed and converted into the w2CAD format. Then, the electron beams were modeled and calculated with and without optional APs. Measured profiles, percentage depth doses, penumbras with respect to each machine, and energy were compared to calculated dose distributions. Results: For VitalBeam, the profile differences between the measurement and calculation were reduced by 0.35%, 0.15%, 0.14%, and 0.38% at 6, 9, 12, and 16 MeV, respectively, when the beams were modeled with APs. For Clinac iX, the differences were decreased by 0.16%, -0.31%, 0.94%, 0.42%, and 0.74%, at 6, 9, 12, 16, and 20 MeV, respectively, with the insertion of APs. Of note, no significant improvements in penumbra and percentage depth dose were observed, although the beam models were configured with APs. Conclusions: The accuracy of the eMC calculation can be improved in profiles when electron beams are modeled with optional APs.
목차
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참고문헌 (20)
참고문헌 신청
Ma CMC / 2020 / Beam modeling and beam model commissioning for Monte Carlo dose calculation-based radiation therapy treatment planning: Report of AAPM Task Group 157 / Med Phys 47:e1~e18
Wanklyn MD / 2016 / Verification measurements of an eMC algorithm using a 2D ion chamber array / J Appl Clin Med Phys 17:320~328
Chetty IJ / 2007 / Report of the AAPM Task Group No. 105:issues associated with clinical implementation of Monte Carlo-based photon and electron external beam treatment planning / Med Phys 34:4818~4853
Pemler P / 2006 / Evaluation of a commercial electron treatment planning system based on Monte Carlo techniques(eMC) / Z Med Phys 16:313~329
Fix MK / 2010 / Monte Carlo dose calculation improvements for low energy electron beams using eMC / Phys Med Biol 55:4577~4588
Wanklyn MD / 2016 / Verification measurements of an eMC algorithm using a 2D ion chamber array / J Appl Clin Med Phys 17:320~328
Chetty IJ / 2007 / Report of the AAPM Task Group No. 105:issues associated with clinical implementation of Monte Carlo-based photon and electron external beam treatment planning / Med Phys 34:4818~4853
Pemler P / 2006 / Evaluation of a commercial electron treatment planning system based on Monte Carlo techniques(eMC) / Z Med Phys 16:313~329
Fix MK / 2010 / Monte Carlo dose calculation improvements for low energy electron beams using eMC / Phys Med Biol 55:4577~4588
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