Progress in Medical Physics (한국의학물리학회지:의학물리)
- Volume 9 Issue 1
- /
- Pages.29-35
- /
- 1998
- /
- 2508-4445(pISSN)
- /
- 2508-4453(eISSN)
The Evaluation of Multiplane-Parallel Chamber Using Crystal Plate as Ionization Medium for Therapeutic Radiation Beams
- Young W. Vahc (Department of Physics, Institute of Basic Medical Science, Yonsei Wonju College of Medicine) ;
- Park, Kyung R. (Department of Radiation Oncology, Yonsei Wonju College of Medicine) ;
- Kim, Sookil (Department of Premedical Science, Koshin Medical College) ;
- Chul W. Joh (Department of Nuclear Medicine, Ajou University) ;
- Kim, Tae H. (School of Computer Engineering, Dongyang University)
- Published : 1998.03.01
Abstract
There has been necessity of an air free ionization chamber using the gold-crystal-aluminium plates, henceforth called the crystal chamber. The crystal chamber formed of parallel plates is very small in size and has more response for absorbed dose of therapeutic radiation beams. The gold plate on the crystal facing the photon and electron beam acts as an intensifier of signals and crystal plate as an ionization medium respectively. Both the copper guard ring and the aluminum collecting electrode are connected to an electrometer. Using high energy photon (6, 15 MV) and electron (9, 12, 15, 18 MeV) beams, the responses of the crystal chamber are evaluated against a PTW Farmer-type chamber at a field size of 10
Keywords