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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Radiology
Journal Basic Information
Journal DOI :
The Korean Society of Radiology (KSR)
Editor in Chief :
Volume & Issues
Volume 4, Issue 4 - Dec 2010
Volume 4, Issue 3 - Sep 2010
Volume 4, Issue 2 - Jun 2010
Volume 4, Issue 1 - Mar 2010
Selecting the target year
A Study on the Fabrication and Physical Properties of
:La Thermoluminescent Phosphors
Kim, Choung-Mi ; Seo, Mi-Kyong ;
Journal of the Korean Society of Radiology, volume 4, issue 4, 2010, Pages 5~10
phosphors doped by La with 0.1 wt%, 0.3 wt%, 0.5 wt%, and 1.0 wt% concentration were prepared by sintering at
for 90 minutes in N2 atmosphere. The phosphors were ground in powdered form and were grouped in
size, then the samples had been exposed to low energy X-ray and UV light. The TL glow curves were measured by heating the phosphors at
rate. There was no significantly meaningful correlation between the TL intensity and the doping level. The intensities of the TL peak measured from X-ray irradiated samples doped with 0.1 wt% were relatively strong. The activation energy and the frequency factor were 0.434 ~ 0.516 eV and 0.5 ~ 0.56, respectively. The intensities of the TL peak measured from UV irradiated samples doped with 0.3 wt% were relatively strong. The activation energy and frequency factor were 0.415 ~ 0.477 eV and 0.5 ~ 0.53, respectively. The TL process were found to be the 2nd order for both X-ray and UV irradiation. The TL intensity was increased linearly with the increase of the radiation dose. In summary, the
phosphors developed in this study showed good TL characteristics at low energy X-ray and UV light. We believe they will be used as TLDs in near future for personal and environmental radiation detection dosimetry.
High Voltage Resonant DC-DC Converter Design for X-Ray Imaging
Baek, Jong-Mu ; Joo, Hae-Jong ; Cho, Moon-Taek ; Lee, Chung-Sik ;
Journal of the Korean Society of Radiology, volume 4, issue 4, 2010, Pages 11~16
In this paper, including the X-ray high voltage resonant inverter generators and high frequency high voltage transformer operating systems is proposed. X-ray generator removes the noise and was smaller, 50[kHz] to work more with the driving frequencies, and that occurred when the normal power supply available due to noise, survey the conditions and solve the problems of the poor was a problem. In addition, X-ray tube voltage, frequency controllers and tube current controller filament heating voltage transformer for high frequency transformer design and manufacture of doing X-ray devices were to become more efficient operation.
Interventional radiology of Bronchial artery embolization due to massive hemoptysis
Min, Byoung-Yun ; Lee, Sang-Bock ;
Journal of the Korean Society of Radiology, volume 4, issue 4, 2010, Pages 17~24
Hemoptysis which is comparatively common symptom in respiratory disease patients is a clinical symptom which has high risk of death in spite of many curative means. Bronchial tube embolization is a very useful medical procedure when hemoptysis does not stop for treatment of internal medicine or surgery and in addition to the purpose of instant hemostasis, for patients for whom surgical operation is impossible or for the purpose of gaining time to improve the state of the patient before surgical operation. In relation to this, this study is to know of the usefulness of bronchial tube artery embolization. The objects were 60 persons for whom bronchial tube artery embolizations are conducted because of large hemoptysis occurred from March 2007 to December 2009 in J hospital. They had large hemoptysis of 400ml or more per day and 200ml or more at a time or though the quantity of hemoptysis was less than 400ml they did not respond to the treatment of internal medicine for 10 days or longer. The average age was 60.5 years and cause diseases were tuberculosis, bronchiectasis, and pneumonia and lung cancer. Embolus parts were Rt bronchial artery 19 examples, Lt bronchial artery, both bronchial artery, Rt Intercostobronchial artery, and they were the case where embolization for many blood vessels were simultaneously carried out. As embolus materials, PVA (conteour) and microcoil were used. In 76.6% of 60 persons of patients hemorrhage stopped with the lapse of time after the procedure and in 4 examples (6.6) re-embolization was carried out due to re-bleeding after the procedure. Bronchial tube artery embolization has high early success rate and effectively controls hemoptysis in the treatment of hemoptysis and is an effective emergency remedy for hemorrhage due to large hemoptysis and will be a good medical procedure which reduces death rate. In addition, primarily if it is conducted together with the treatment of internal medicine it will be, as an effective curative means for hemorrhage due to large hemoptysis, a good mediate radial rays medical procedure which reduces death rate.
Study on Fabrication and Photoluminescent Properties of Fine Phosphor Film for Application of Radiation Image Sensor
Kang, Sang-Sik ; Choi, Young-Zoon ; Lee, Kwang-Oop ; Moon, Yong-Soo ; Kim, Mi-Young ; Lee, Sang-Bong ; Jung, Bong-Jae ; Park, Ji-Koon ;
Journal of the Korean Society of Radiology, volume 4, issue 4, 2010, Pages 25~28
In this paper, the fabrication and feasibility study of clinical application with euripium doped gadollium oxide (
:Eu) nano phosphor derived by low-temperature solution combustion method. From the fabricated phosphor, the photoluminescent characteristic and linearity as a function of phosphor film thickness were investigated to evaluate x-ray converstion properties. From the experimental results, the luminescent intensity was
:Eu film and this value is higher 1.2 time the conventional bulk phosphor, which is possible to imaging acquisition. And good linearity was shown at x-ray exposure range for clinical diagnostic application.
Measurement of Energy Dependent Neutron Capture Cross Sections of
in Energy Region from 0.1 eV to 10 keV using a Lead Slowing-down Spectrometer
Yoon, Jung-Ran ;
Journal of the Korean Society of Radiology, volume 4, issue 4, 2010, Pages 29~32
The neutron capture cross section of
has been measured relative to the
standard cross section by the neutron time-of-flight(TOF) method using a 46-MeV electron linear accelerator(linac) at the Research Reactor Institute, Kyoto University(KURRI). In order to experimentally prove the result obtained, the supplementary cross section measurement has been made from 0.1 eV to 10 keV using the Kyoto University Lead slowing-down spectrometer (KULS) coupling to the linac. The relative measurement by the TOF method has been normalized to the reference value(24.5 b) at 1 eV. The evaluated capture cross sections in JENDL/D-99 Dosimetry have been compared with the current measurements by the KULS experiments.
Property of Carbon Layer for C/W Multilayer Mirror
Park, Byoung-Hun ; Choi, Hyung-Wouk ; Oh, Sun-Ju ; Yoon, Kwon-Ha ; Chon, Kwon-Su ;
Journal of the Korean Society of Radiology, volume 4, issue 4, 2010, Pages 33~36
Multilayer mirrors are very useful for applications of high energy X-ray. X-rays of high energy require very small thickness, a few nanometers, in the d-spacing of a multilayer mirror. Each layer is composed of a multilayr mirror influences to interfacial roughness or interdiffusion which gives rise to degrade specular reflection. Carbon layer of 1 nm thick in a C/W multilayer mirror of 3.25 nm d-spacing was examined. Carbon as well as tungsten layers were very uniform, and there was no micro-structure in carbon layers. However, interdiffusion between carbon and tungste layers was observed by a transmission electron microscope.
Transport Properties of Charge Carrier in Amorphous Selenium Converter drived by Vacuum Thermal Evaporation Method
Park, Ji-Koon ; Choi, Il-Hong ; Lee, Mi-Hyun ; Lee, Kwang-Phoo ; Yu, Haeng-Soo ; Jung, Bong-Zae ; Kang, Sang-Sik ; Kim, Mi-Young ;
Journal of the Korean Society of Radiology, volume 4, issue 4, 2010, Pages 37~40
In this paper, transport properties of charge carrier which is produced by x-ray exposure were investigated.. It is the research of charge transport and specific property of trap that is performed in direct digital x-ray image receptor. We measured transit time and drift mobility of charge carriers of a-Se photoconductor using time-of-flight method. We made a testing glass with a-Se of
thickness on corning glass using thermal evaporation method. As a result of this experiment, electron and hole transit time was each
electric field and drift mobility was each
. But the results shows us different measurement value of electron and charge drift mobility and it was investigated about charge transport properties and trap mechanism.