http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Sea Duk Jang (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Effects of Beam Irregularity on Uniform Scanning
김창혁,Sea Duk Jang,양태건 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.69 No.6
An active scanning beam delivery method has many advantages in particle beam applications. For the beam is to be successfully delivered to the target volume by using the active scanning technique, the dose uniformity must be considered and should be at least 2.5% in the case of therapy application. During beam irradiation, many beam parameters affect the 2-dimensional uniformity at the target layer. A basic assumption in the beam irradiation planning stage is that the shape of the beam is symmetric and follows a Gaussian distribution. In this study, a pure Gaussian-shaped beam distribution was distorted by adding parasitic Gaussian distribution. An appropriate uniform scanning condition was deduced by using a quantitative analysis based on the gamma value of the distorted beam and 2-dimensional uniformities.
-
Ridge Filter Design For a Particle Therapy Line
김창혁,한가람,이화련,김현용,장홍석,김정환,박동욱,Sea Duk Jang,황원택,김근범,양태건 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.9
The beam irradiation system for particle therapy can use a passive or an active beam irradiationmethod. In the case of an active beam irradiation, using a ridge filter would be appropriate togenerate a spread-out Bragg peak (SOBP) through a large scanning area. For this study, a ridgefilter was designed as an energy modulation device for a prototype active scanning system at MC-50in Korea Institute of Radiological And Medical Science (KIRAMS). The ridge filter was designed tocreate a 10 mm of SOBP for a 45-MeV proton beam. To reduce the distal penumbra and the initialdose, [DM] determined the weighting factor for Bragg Peak by applying an in-house iteration codeand the Minuit Fit package of Root. A single ridge bar shape and its corresponding thickness wereobtained through 21 weighting factors. Also, a ridge filter was fabricated to cover a large scanningarea (300 × 300 mm2) by Polymethyl Methacrylate (PMMA). The fabricated ridge filter was testedat the prototype active beamline of MC-50. The SOBP and the incident beam distribution wereobtained by using HD-810 GaF chromatic film placed at a right triangle to the PMMA block. Thedepth dose profile for the SOBP can be obtained precisely by using the flat field correction andmeasuring the 2-dimensional distribution of the incoming beam. After the flat field correction isused, the experimental results show that the SOBP region matches with design requirement well,with 0.62% uniformity.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
