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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 2, Issue 4 - Dec 2008
Volume 2, Issue 3 - Sep 2008
Volume 2, Issue 2 - Jun 2008
Volume 2, Issue 1 - Mar 2008
Selecting the target year
Study on a moir
Artifact in the Use of Carbon Interspaced Antiscatter Grids for Digital Radiography
Lee, Sung-Ju ; Cho, Hyo-Sung ; Choi, Sung-Il ; Cho, Hee-Moon ; Oh, Ji-Eun ; Lee, So-Young ; Park, Yeon-Ok ; Lee, Min-Sik ;
Journal of the Korean Society of Radiology, volume 2, issue 4, 2008, Pages 5~9
Antiscatter grids are widely used in radiography to remove scattered X-rays and thus improve the image contrast. However, the use of grids makes moir
artifact in the digital image, and this can be a critical reason for a mistaken diagnosis. In this paper, we examined that moire artifacts are how to relate with grid frequency, pixel pitch and grid rotation angle. To experiment we prepared 6 grids having different line frequencies (4.0 to 8.5lines/mm) and tested with a DR imager having a
pixel size. In the result of this experiment, we could get data about moir
artifact that could be make solution to remove the line artifact for the successful use of the grid in digital radiography. The acquired data and theory through this experiment, are expected to make contribution to the elimination of moir
artifact in the DR system.
A study on Quality Control of Mammography Equipment in the Gwang-Ju
Shin, Ji-Yun ; Lee, Sang-Bock ; Jin, Gye-Hwan ; Lee, Sam-Yeol ; Lee, Jun-Haeng ;
Journal of the Korean Society of Radiology, volume 2, issue 4, 2008, Pages 11~25
As breast cancer shows the highest incidence among women's cancers, the use of mammography is also increasing as a screening test. Mammography should produce high-quality images for accurate diagnosis. For this, it is necessary to manage the performance and image quality of mammography. Thus, in order to investigate quality control, the present study conducted a questionnaire survey of 37 hospitals registered as breast cancer medical examination centers in Gwang-Ju, concerning their quality control of mammography. In the results of surveying the characteristics of apparatus use for mammography, many respondents did not know about the equipment that they were using. Of the hospitals, 19 (49%) were using film, 19 (49%) CR, and 1 DR. In the results of asking how to do quality control, only 38% answered that they inspected according to the manual. In addition, all the surveyed hospitals had specialized agencies do quality control for them. As to the reason for using agencies, 65% mentioned limitations in personnel, time, distance, etc, and 44% mentioned the absence of machines and materials. These results suggest that quality control is being performed perfunctorily, as well as passively and indifferently as it relies on specialized agencies. Accordingly, it is necessary to provide regular education for enhancing people's perception of quality control and to perform quality control adequately in the presence of Radiologist.
A Study on the Public Recognition Change on Radiation by Providing Education and Practice
Kang, Bo-Sun ; Park, Soo-Jin ; Lee, Hyo-Jin ;
Journal of the Korean Society of Radiology, volume 2, issue 4, 2008, Pages 27~32
The role of radiation application technologies and nuclear power is priceless for the recent life of human beings without regardless of nation and race. Nevertheless the advantages, there are lots of difficulties in planning and investigating in the nationwide nuclear related business or the research in Korea. Since the major obstacle is the misderstanding radiation itself by misleading knowleges on it, it is important to make public understand radiation correctly. The result of this research shows that the public recognition could be guided to be friendly and cooperative to the radiation technology by providing educations and experimental experience.
Image Restoration Simulation of Digital X-ray Images Based upon Filtering Techniques and the Quality Evaluation of the Restored Images
Lee, So-Young ; Choi, Sung-Il ; Oh, Ji-Eun ; Cho, Hee-Moon ; Lee, Sung-Ju ; Park, Yeon-Ok ; Cho, Hyo-Sung ;
Journal of the Korean Society of Radiology, volume 2, issue 4, 2008, Pages 33~40
Images acquired by a digital X-ray imaging system are inherently degraded due to system degradation process and additive noise sources. The system degradation in image quality is typically described as the system response function characterized by the modulation transfer function (MTF) and the noise term described as the noise power spectrum (NPS). In this case, we can restore the blur image as close as possible to the original image by using modified filtering designed for digital imaging system, as we know more precisely about the MTF and the NPS. In this paper, by performing simulation, we tried to restore blurred images taken from a digital X-ray imaging system based upon conventional filtering techniques such as a direct-inverse filtering, limited-inverse filtering, or a Wiener filtering, and evaluated the characteristics of the image restoration.
3-D CT Imaging of Pathological Bone Changes in a Rat Model of Adjuvant-Induced Arthritis
Shim, Kyung-Mi ; Kim, Se-Eun ; Kang, Seong-Soo ;
Journal of the Korean Society of Radiology, volume 2, issue 4, 2008, Pages 41~46
Computed tomography (CT) is a medical imaging method employing tomography. CT is a 3-Dimensional (3-D) radiographic imaging technique, which is not suited for assessment of inflammation, but can be considered a reference method for assessment of bone damage, due to its direct 3-D visualization of calcified tissue. In this study of pathological joint changes in a rat model of adjuvant-induced arthritis (AIA) and quality analysis of bone destructions were performed by 3-Dimensional computed tomography images. These data demonstrate that the destructive progression of disease in a rat AIA model can be quantified using 3-D CT image analysis, which allows assessment of arthritic disease status and efficacy of experimental therapeutic agents.