Radiation Oncology Journal
- Volume 9 Issue 1
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- Pages.131-141
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- 1991
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- 2234-1900(pISSN)
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- 2234-3156(eISSN)
Characteristics of 15 MV Photon Beam from a Varian Clinac 1800 Dual Energy Linear Accelerator
CLINAC 1800 선형가속기의 15 MV X-선의 특성
- Kim, Kye-Jun (Department of Radiation Oncology, Yonsei University, Wonju College of Medicine) ;
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Lee, Jong-Young
(Department of Radiation Oncology, Yonsei University, Wonju College of Medicine) ;
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Park, Kyung-Ran
(Department of Radiation Oncology, Yonsei University, Wonju College of Medicine)
- Published : 1991.06.01
Abstract
A comprehensive set of dosimetric measurements has been made on the Varian Clinac 1800 15 MV photon beam. Beam quality, percentage depth dose, dose in the build up region, output, symmetry and flatness, transmission through iead (Cerrobend), tray attenuation, isodose curves for the open and wedged fields were measured using 3 dimensional water phantom dosimetry system (including film densitometer system) and polystyrene phantoms. These dosimetric measurements sufficiently characterized the beam to permit clinical use. The depth dose characteristics of photon beam is
국내에서 처음으로 사용되는 CLINAC 1800에서 발생된 15MV X-선의 특성을 구하기 위하여 3 Dimensional water Phantom Dosimetry system)를 이용하여 방사선 치료에 근간이 되는 심부선량 백분율(POD), 최대 조직 비율(TMR), 편평도(beam profile), 대칭도, Wedge인자 등을 측정하였고 선량계산을 위하여 출력 인자들을 구하였다. 1. 선축상 최대치 지점(Dmax)은 SSD 100cm일때 조사면이