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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 1, Issue 3 - Dec 2007
Volume 1, Issue 2 - Sep 2007
Volume 1, Issue 1 - May 2007
Selecting the target year
A Study on Knowledge and Acceptance of Irradiated Food -Department of Radiological science, Food and Biotechnology-
Kim, Kee-Bog ;
Journal of the Korean Society of Radiology, volume 1, issue 1, 2007, Pages 5~10
A survey was conducted to examine the major that is Radiological, Food and Biotechnology in S city of the Chung nam by the self-administered questionnaire. Data was collected total of 208 participants with the 93 male subjects and 115 female subjects The results of this study can be summarized as follows; 1. Out of 208 subjects participants with the 81 subjects(38.9%) was answered that I was knowed of the food irradiation, the greater part of the Food and Biotechnology wasn't know, 32 subjects(15.4%) of the respondents to the Radiological science did extremely much know. 2. If one of the an institution or organization of the most trustworthy scientific investigation proved willingly make a purchase to use irradiated food. the acceptance of irradiated food significantly decreased the mean scores of concern about a sex and grade(P<0.204, P<0.418). 3. Recently the government doing to prevented spreading of food poisoning accidents by school lunch, out of 204 subjects with 18 subjects(8.8%) is very required, with the 87 subjects(42.6%) is generally required, therefore total of 105 subjects(51.5%) is a positive answer, there was statistical significantly increased very association between necessity of food irradiated and planing of the government follow-up measures(P<0.009).
Evaluation of Contrast-detail Characteristics of an A-Se Based Digital X-ray Imaging System
Hyun, Hye-Kyung ; Park, So-Hyun ; Kim, Keun-Young ; Cho, Hee-Moon ; Cho, Hyo-Sung ;
Journal of the Korean Society of Radiology, volume 1, issue 1, 2007, Pages 11~16
In this study, we have performed contrast-detail analysis for an amorphous selenium(a-Se) based digital X-ray imaging system by using a contrast-detail phantom(CDRAD 2.0) to test its low contrast performance. The X-ray imaging system utilizes an 500-mm-thick a-Se semiconductor X-ray absorber coated over an amorphous silicon(a-Si) TFT(thin-film transistor) detector matrix with a
pixel size and a
active area. In the measurement of contrast-detail curves we first acquired X-ray images of the CDRAD 2.0 phantom at given test conditions(i.e., 40, 50, 60, 70, 80 kVp, and 16 mA.s), and then evaluated the contrast-detail characteristics of the imaging system from each phantom image by using an image quality factor called the image-quality-figure-inverse(IQFinv). The IQFinv values for the imaging system gradually improved with the photon fluence, indicating the improvement of image visibility: 24.4, 35.3, 39.2, 41.5, and 43.4 at photon fluences of
Temporal Variations of Cerebrovascular Diseases in a University Hospital
Lee, Mi-Yon ; Lee, Sang-Bock ; Lee, Jun-Hang ; Lee, Sam-Yul ; Lee, Tae-Soo ; Jin, Gye-Hwan ;
Journal of the Korean Society of Radiology, volume 1, issue 1, 2007, Pages 17~23
Background: Cerebrovascular diseases are known to show different patterns of incidence among regions and races. Therefore, it is very important to determine the incidence pattern of a specific area in order to diagnose, treat and prevent cerebrovascular diseases. The objective of the present study is to analyze quantitatively the incidence ratios of hemorrhagic and ischemic cerebrovascular diseases by season, by gender and by age. Methods: The subjects of this study were 1603 patients hospitalized for hemorrhagic or ischemic cerebrovascular diseases at the Department of Neurosurgery or the Department of Neurology of a University Hospital. Statistical analysis of data used Excel 2003 of Microsoft, and t-test was conducted using ORIGIN 6.0 of MICROCAL. Results: In the subjects, the incidence ratios of hemorrhagic and ischemic cerebrovascular diseases for four years, the period of this research, were 38.55% and 61.45%, respectively. The mean and standard deviation of age when hemorrhagic cerebrovascular diseases occurred were 58.20 and 12.60, respectively, and the percentages of subjects in their 40s, 50s, 60s and 70s were all around 20%. On the contrary, the mean and standard deviation of age when ischemic cerebrovascular diseases occurred were 65.01 and 13.59, respectively. The average age of patients with ischemic cerebrovascular diseases was older than that of patients with hemorrhagic brain diseases, and the percentages of those in their 60s, 70s and 80s were 15.53%, 37.06% and 27.72%, respectively. The season when hemorrhagic cerebrovascular diseases appeared most frequently was winter, which was followed by summer, spring and autumn. The season when hemorrhagic cerebrovascular diseases appeared most frequently was spring, which was followed by summer, winter and autumn. Conclusions: In this study, the incidence rates of hemorrhagic and ischemic cerebrovascular diseases were 38.55% and 61.45%, showing the rising percentage of ischemic cerebrovascular diseases. For making adequate prevention and disease control plans, it is considered necessary to make a long-term epidemiological investigation of cerebrovascular diseases.
The Evaluation of CR and DDR chest image using ROC analysis
Park, Yeon-Ok ; Jung, Eun-Kyung ; Park, Yeon-Jung ; Nam, So-Ra ; Jung, Ji-Young ; Kim, Hee-Joung ;
Journal of the Korean Society of Radiology, volume 1, issue 1, 2007, Pages 25~30
ROC(Receiver Operating Characteristic)curve is the method that estimate detected insignificant signal from the human's sense of sight, it has been raised excellent results. In this study, we evaluate image quality and equipment character by obtaining a chest image from CR(Computed Radiography) and DDR(Direct Digital radiography) using the human chest phantom, The parameter of exposure for obtaining chest image was 120 kVp/3.2 mAs and the SID(Source to Image Distance) was 180cm. The images were obtained by CR(AGFA MD 4.0 General plate, JAPAN) and DDR(HOLOGIC nDirect Ray, USA). Using some pieces of Aluminum and stone for expressing regions, then attached them on the heart, lung and thoracic vertebrae of the phantom. 29 persons hold radiology degrees were participated in ROC analysis. As a result of the ROC analysis, TPF(true positive fraction) and FPF(false positive fraction) of DDR and CR are 0.552 and 0.474 and 0.629 and 0.405, respectively. By using the results, the ROC curve of CR has higher image quality than DDR. According to the theory, DDR has the higher image quality than CR in chest X-ray image. But, CR has the higher image quality than DDR. quality of DDR inserted the enhance board. The results confirmed that image post-processing is important element decipherment of clinical.
Quantitative Analysis and Comparison of DR and CR image quality
Park, Hey-Suk ; Seo, Jang-Yeon ; Jeong, Jin-Hwa ; Lee, Chang-Lae ; Cho, Hyo-Min ; Kim, Hee-Joung ;
Journal of the Korean Society of Radiology, volume 1, issue 1, 2007, Pages 31~37
The purpose of this research was to compare and analyze image quality for each Detector of CR(Computed Radiography) and DR(Digital Radiography). The results showed that CR(AGFA MD 4.0 General plate, JAPAN) was superior to DR(HOLOGIC nDirect Ray, USA) based on the quantitative values and comparison of MTF(Modulation Transfer Function), NPS(Noise Power Spectrum), Photon fluence and DQE(Detective Quantum Efficiency) which have been widely accepted for the estimation of CR and DR. Quantitative evaluations of CR and DR system were obtained and they may be very helpful for QA and QC of general X-ray systems.
Wireless Measurement of Human Motion Based on PDA
Lee, Myong-Ho ; Kim, Nam-Jin ; Lee, Hwun-Jae ; Jin, Gae-Whan ; Lee, Sam-Ual ; Lee, Jun-Hang ; Lee, Sang-Bock ; Lee, Tae-Soo ;
Journal of the Korean Society of Radiology, volume 1, issue 1, 2007, Pages 39~44
In this study, wireless measurement technique for human motion was developed to monitor movement disorder patients during their daily life. MICA, TinyOS, and nesC, developed by UC Berkeley, were used as wireless sensor, its software platform, and programming language. The human motion data, generated by two axial accelerometer(ADXL202) was transmitted to PDA(iPaq3630) by 916Mhz short range communication chip(TR1000). It could be stored at PDA by simple Windows CE programming. To test the developed device, it was attached at human chest and the acquired data was shown as a graph during his motion of sitting, standing, and lying. The result showed that human motion could be logged without any hooking and constraints. Therefore, this device can be used to monitor patient's movement disorder and activity of daily life(ADL).
Measurement of Neutron Capture Gamma-ray Spectrum of Natural Gold in the keV Energy Region
Lee, Jae-Hong ; Lee, Sam-Yol ; Lee, Sang-Bock ; Lee, Jun-Haeng ; Jin, Gye-Hwan ;
Journal of the Korean Society of Radiology, volume 1, issue 1, 2007, Pages 45~49
keV-neutron capture gamma-ray spectrum of
(natural gold) sample have been measured in neutron energy range from 10 to 90 keV using the 3-MV pelletron accelerator of the Research Laboratory for Nuclear Reactors at the Tokyo Institute of Technology. Pulsed keV neutrons were produced from the
reaction by bombarding on the
target with the 1.5-ns bunched proton beam. The incident neutron spectrum on the Au sample was measured by a
-glass scintillation detector and TOF method. Capture gamma-rays from Au sample were measured by anti-Compton NaI(TI) spectrometer. Five average neutron energy regions were selected to obtain the neutron capture spectrum. Several gamma-ray peaks in the spectrum were found in the present experiment.