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
오류제보하기
The aim of this study is to present commissioning results of the ViewRay system. We verified safety functions of the ViewRay system. For imaging system, we acquired signal to noise ratio (SNR) and image uniformity. In addition, we checked spatial integrity of the image. Couch movement accuracy and coincidence of isocenters (radiation therapy system, imaging system and virtual isocneter) was verified. Accuracy of MLC positioing was checked. We performed reference dosimetry according to American Association of Physicists in Medicine (AAPM) Task Group 51 (TG-51) in water phantom for head 1 and 3. The deviations between measurements and calculation of percent depth dose (PDD) and output factor were evaluated. Finally, we performed gamma evaluations with a total of 8 IMRT plans as an end-to-end (E2E) test of the system. Every safety system of ViewRay operated properly. The values of SNR and Uniformity met the tolerance level. Every point within 10 cm and 17.5 cm radii about the isocenter showed deviations less than 1 mm and 2 mm, respectively. The average couch movement errors in transverse (x), longitudinal (y) and vertical (z) directions were 0.2 mm, 0.1 mm and 0.2 mm, respectively. The deviations between radiation isocenter and virtual isocenter in x, y and z directions were 0 mm, 0 mm and 0.3 mm, respectively. Those between virtual isocenter and imaging isocenter were 0.6 mm, 0.5 mm and 0.2 mm, respectively. The average MLC positioning errors were less than 0.6 mm. The deviations of output, PDDs between mesured vs. BJR supplement 25, PDDs between measured and calculated and output factors of each head were less than 0.5%, 1%, 1% and 2%, respectively. For E2E test, average gamma passing rate with 3%/3 mm criterion was 99.9%±0.1%.
목차
등록된 정보가 없습니다.
참고문헌 (13)
참고문헌 신청
Stam MK / 2013 / Kidney motion during free breathing and breath hold for MR-guided radiotherapy / Phys Med Biol 58(7):2235~2245
Seierstad T / 2009 / MR-guided simultaneous integrated boost in preoperative radiotherapy of locally advanced rectal cancer following neoadjuvant chemotherapy / Radiother Oncol 93(2):279~284
Mutic S / 2014 / The ViewRay system: magnetic resonance-guided and controlled radiotherapy / Semin Radiat Oncol 24(3):196~199
Wooten HO / 2015 / Quality of Intensity Modulated Radiation Therapy Treatment Plans Using a Co-60Magnetic Resonance Image Guidance Radiation Therapy System / Int J Radiat Oncol Biol Phys 92(4):771~778
Wooten HO / 2015 / Benchmark IMRT evaluation of a Co-60 MRI-guided radiation therapy system / Radiother Oncol 114(3):402~405
Seierstad T / 2009 / MR-guided simultaneous integrated boost in preoperative radiotherapy of locally advanced rectal cancer following neoadjuvant chemotherapy / Radiother Oncol 93(2):279~284
Mutic S / 2014 / The ViewRay system: magnetic resonance-guided and controlled radiotherapy / Semin Radiat Oncol 24(3):196~199
Wooten HO / 2015 / Quality of Intensity Modulated Radiation Therapy Treatment Plans Using a Co-60Magnetic Resonance Image Guidance Radiation Therapy System / Int J Radiat Oncol Biol Phys 92(4):771~778
Wooten HO / 2015 / Benchmark IMRT evaluation of a Co-60 MRI-guided radiation therapy system / Radiother Oncol 114(3):402~405
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