http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Patient dose measurements in diagnostic radiology procedures in Korea
Kim, You-hyun,Choi, Jong-hak,Kim, Chang-kyun,Kim, Jung-min,Kim, Sung-soo,Oh, Yu-whan,Lee, Chang-yeap,Kang, Dae-hyun,Lee, Young-bae,Cho, Pyong-kon,Kim, Hyung-chul,Kim, Chel-min Nuclear Technology Publishing 2007 Radiation Protection Dosimeetry Vol.123 No.4
Monte Carlo simulation of the photon beam characteristics from medical linear accelerators.
Kim, H K,Han, S J,Kim, J L,Kim, B H,Chang, S Y,Lee, J K Nuclear Technology Publishing 2006 Radiation Protection Dosimeetry Vol.119 No.1-4
<P>The MCNPX code has been employed on a personal computer to calculate the dosimetric characteristics of the photon beams from the 6 MV Siemens MX2 and the 10 MV Varian Clinac 2100C linear accelerators. A model of the treatment head includes the major geometric structure within the beam path. The model was used to calculate the energy spectra of the photon beam, percentage depth dose and the dose profiles. The accuracy of the calculated results is examined by comparing them with the measured dose distributions for the two machines. The computed and measured depth dose curves agree to within 2% for all the depths beyond the build-up region for both treatment machines. The calculations agree to within 2% of the measured profiles within the 100-50% dose level. It has been found that the MCNPX code is an effective tool for simulating the clinical photon beam.</P>
PRDC-A software package for personnel radiation dose calculation
Kim, Chan-Hyeong,Cho, Sang Hyun,Xu, X. George Nuclear Technology Publishing 2006 Radiation Protection Dosimeetry Vol.118 No.3
<P>To determine effective dose, we usually need to use a very complicated human body model and a sophisticated computer code to transport radiations in the body model and surrounding medium, which is not very easy to practicing health physicists in the field. This study develops and tests a software package, called PRDC (Personnel Radiation Dose Calculation), which calculates effective dose and radiation doses to various organs/tissues and personal dosemeters based on a series of interpolations.</P>
Genotoxicity in earthworm after combined treatment of ionising radiation and mercury
Ryu, Tae Ho,An, Kwang-Guk,Kim, Jin Kyu Nuclear Technology Publishing 2014 Radiation Protection Dosimeetry Vol.159 No.1
<P>This study was performed to investigate the acute genotoxic effects of mercury and radiation on earthworms (<I>Eisenia fetida</I>). The levels of DNA damage and the repair kinetics in the coelomocytes of <I>E. fetida</I> treated with mercuric chloride (HgCl<SUB>2</SUB>) and ionising radiation (gamma rays) were analysed by means of the comet assay. For detection of DNA damage and repair, <I>E. fetida</I> was exposed to HgCl<SUB>2</SUB> (0–160 mg kg<SUP>−1</SUP>) and irradiated with gamma rays (0–50 Gy) <I>in vivo</I>. The increase in DNA damage depended on the concentration of mercury or dose of radiation. The results showed that the more the oxidative stress induced by mercury and radiation the longer the repair time that was required. When a combination of HgCl<SUB>2</SUB> and gamma rays was applied, the cell damage was much higher than those treated with HgCl<SUB>2</SUB> or radiation alone, which indicated that the genotoxic effects were increased after the combined treatment of mercury and radiation.</P>
Long counter and its application for the calibration of the neutron irradiators
Park, Hyeonseo,Kim, Jungho,Choi, Kil-Oung Nuclear Technology Publishing 2014 Radiation Protection Dosimeetry Vol.161 No.1
<P>The Korea Research Institute of Standards and Science (KRISS) has constructed a new long counter that can be disassembled in parts and reassembled. This counter can be easily transported and used as a transfer standard instrument for neutron fluence measurements. The response function and the effective centre of the counter are investigated by calculating neutron energies from thermal to 30 MeV using MCNPX. By carrying out measurements using a <SUP>252</SUP>Cf source in the KRISS irradiation room, the accuracy of the evaluated effective centre position is confirmed. The ‘distance variation method’ is adopted to eliminate the effect of inscatter neutrons. This method is effective and used for the experimental determination of the effective centre. The neutron emission rates determined by the neutron fluence measurements using the long counter developed are compared with those measured by a manganese sulphate bath, and show good agreement within 3 %.</P>