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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국의학물리학회 의학물리 의학물리 제29권 제2호
- 발행연도
- 2018.6
- 수록면
- 59 - 65 (7page)
- DOI
- https://doi.org/10.14316/pmp.2018.29.2.59
이용수
초록· 키워드
오류제보하기
This paper describes the clinical use of the dose verification of multileaf collimator (MLC)-based CyberKnife plans by combining the Octavius 1000SRS detector and water-equivalent RW3 slab phantom. The slab phantom consists of 14 plates, each with a thickness of 10 mm. One plate was modified to support tracking by inserting 14 custom-made fiducials on surface holes positioned at the outer region of 10×10 cm2. The fiducial-inserted plate was placed on the 1000SRS detector and three plates were additionally stacked up to build the reference depth. Below the detector, 10 plates were placed to avoid longer delivery times caused by proximity detection program alerts. The cross-calibration factor prior to phantom delivery was obtained by performing with 200 monitor units (MU) on the field size of 95×92.5 mm2. After irradiation, the measured dose distribution of the coronal plane was compared with the dose distribution calculated by the MultiPlan treatment planning system. The results were assessed by comparing the absolute dose at the center point of 1000SRS and the 3-D Gamma (γ) index using 220 patient-specific quality assurance (QA). The discrepancy between measured and calculated doses at the center point of 1000SRS detector ranged from ?3.9% to 8.2%. In the dosimetric comparison using 3-D γ-function (3%/3 mm criteria), the mean passing rates with γ-parameter ≤ 1 were 97.4%±2.4%. The combination of the 1000SRS detector and RW3 slab phantom can be utilized for dosimetry validation of patient-specific QA in the CyberKnife MLC system, which made it possible to measure absolute dose distributions regardless of tracking mode.
목차
등록된 정보가 없습니다.
참고문헌 (13)
참고문헌 신청
Blomgren H / 1995 / Stereotactic high dose fraction radiation therapy of extracranial tumors using an accelerator. Clinical experience of the first thirty-one patients / Acta Oncol 34(6):861~870
윤정민 / 2018 / Acceptance Testing and Commissioning of Robotic Intensity-Modulated Radiation Therapy M6 System Equipped with InCiseTM2 Multileaf Collimator / 의학물리 29(1):8~15
Murai T / 2017 / Comparison of multileaf collimator and conventional circular collimator systems in Cyberknife stereotactic radiotherapy / J Radiat Res 58(5):693~700
Mcguinness CM / 2015 / Investigating the clinical advantages of a robotic linac equipped with a multileaf collimator in the treatment of brain and prostate cancer patients / J Appl Clin Med Phys 16(5):284~295
Dieterich S / 2011 / Report of AAPM TG 135 : quality assurance for robotic radiosurgery / Med Phys 38(6):2914~2936
윤정민 / 2018 / Acceptance Testing and Commissioning of Robotic Intensity-Modulated Radiation Therapy M6 System Equipped with InCiseTM2 Multileaf Collimator / 의학물리 29(1):8~15
Murai T / 2017 / Comparison of multileaf collimator and conventional circular collimator systems in Cyberknife stereotactic radiotherapy / J Radiat Res 58(5):693~700
Mcguinness CM / 2015 / Investigating the clinical advantages of a robotic linac equipped with a multileaf collimator in the treatment of brain and prostate cancer patients / J Appl Clin Med Phys 16(5):284~295
Dieterich S / 2011 / Report of AAPM TG 135 : quality assurance for robotic radiosurgery / Med Phys 38(6):2914~2936
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