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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 9, Issue 7 - Dec 2015
Volume 9, Issue 6 - Oct 2015
Volume 9, Issue 5 - Aug 2015
Volume 9, Issue 4 - Jun 2015
Volume 9, Issue 3 - Apr 2015
Volume 9, Issue 2 - Feb 2015
Volume 9, Issue 1 - Jan 2015
Selecting the target year
PSNR Analysis of Ultrasound Images for Follow-up of Hepatocellular Carcinoma
Lee, Junhaeng ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 263~267
DOI : 10.7742/jksr.2015.9.5.263
In this paper, a method was proposed for objective and scientific judgment on disease conditions that is currently relied on subjective judgment of ultrasound practitioners. In the proposed method, mean squared errors (MSE) in ultrasound images for follow-up of HCC patients were obtained and the Peak Signal to Noise Ratio(PSNR) of the ultrasound images was analyzed. According to the results of analysis, MSE and PSNR values changed over time. This is attributable to changes in ultrasound images resulting from increases in utrasonic echoes following the progression of HCC. The results of the present study can be used as a method for scientific and objective judgment in ultrasonic scan instead of current subjective judgment by practitioners.
An Integrative Review on Domestic Site Release Criteria of Nuclear Power Plant based on the Analysis of Foreign Site Release Criteria
Bae, YuJung ; Kim, Yongmin ; Ahn, Seokyoung ; Kim, Cheol Min ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 269~277
DOI : 10.7742/jksr.2015.9.5.269
In recent years, concern about the decommissioning of nuclear power plants has been growing according to the nuclear power plants aging. Although site reuse is one of the most important issues in doing decommissioning of nuclear power plants in view of the internal affairs, there is currently no specific standard of the site release criteria for site reuse in the Republic of Korea. In this study, we analyzed the international safety standards for the site release(IAEA's Safety Guide No. WS-G-5.1) and the present domestic condition. Also, we studied the site release criteria and real life examples about advanced countries such as United states and Europe, which already have experience of decommissioning or site release. As a results of the study, we suggested proper standards and future consideration to establish site release criteria. This will be used for preliminary data for establishing the domestic site release criteria after the decommissioning of nuclear power plants.
The Evaluation of Eye Dose and Image Quality According to The New Tube Current Modulation and Shielding Techniques in Brain CT
Kwon, Soonmu ; Kim, Jungsu ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 279~285
DOI : 10.7742/jksr.2015.9.5.279
The eye of human is a radiation sensitive organ and this organ should be shielded from radiation exposure during brain CT procedures. In the brain CT procedures, bismuth protector using to reduce the radiation exposure dose for eye. But protecting the bismuth always accompanies problem of the image quality reduction including artifact. This study aim is the eye radiation exposure dose and image quality evaluation of the new tube current modulation such as new organ based-tube current modulation, longitudinal-TCM, angular-TCM between shielding scan technique using bismuth and lead glasses. As a result, radiation dose of eye is reduced 25.88% in new OB TCM technique then reference scan technique and SNR new OB TCM is 6.05 higher than bismuth shielding scan technique and lower than reference scan technique. In clinical brain CT, new OB TCM technique will contribute to reduction of radiation dose for eye without decrease of image quality.
The Usability Evaluation Half Beam Radiation Treatment Technique on the Esophageal Cancer
Park, Hochoon ; Kim, Youngjae ; Jang, Seongjoo ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 287~293
DOI : 10.7742/jksr.2015.9.5.287
Because of esophageal cancer has the long length of the lesion and also inhomogeneous in depth. So, the radiation dose distribution was inhomogeneous in radiation therapy. To overcomes the dose distribution uniformity using half beam method. Patient's CT image was used radiation treatment planning. We used two planning methods that one is the using normal beam and another is using half beam. Than comparing the two radiotherapy planning using target coverage, dose volume histogram, conformity index, homogeneity index and normal tissues - heart, spinal cord, lung -. In results, Treatment planning using half beam is little more than normal beam in target coverage, dose volume histogram, conformity index, homogeneity index and normal tissues covering. However, If the patient is not correct position patients may arise a side effect. Thus, the using in Half beam involving the geometrically exact under lung cancer is considered to advantage.
C Ions Shielding Benchmark Calculations using MCNPX with Different Nuclear Data Libraries
Shin, Yun Sung ; Kim, yong min ; Kim, dong hyun ; Jung, nam suk ; Lee, hee seock ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 295~300
DOI : 10.7742/jksr.2015.9.5.295
There are various type of particle accelerators such as Kyoungju 100-MeV proton beam accelerator in Korea. And Korea plans to build large particle accelerator such as heavy ion accelerator and 4th generation light source facility. The accelerated high energy particles of these facility produce 2nd neutron after nuclear reaction with target materials. And then these 2nd neutron activate structural materials and surrounding environment. Accordingly, it is important to consider the activation and shielding calculation on design of facility for safety operation. In this study, we tried to calculate and compare the neutron flux from the interaction
beam with target material(Cu) according to thickness of iron and concrete shielding material by MCNPX 2.7 with nuclear library JENDL/HE 07and la150. To verify the properties of nuclear library, we compared computational results with experimental value. These results can be used for dose evaluation technology in planning of the shielding of large particle accelerator.
Inspection of electronic components using dual X-ray energy
Chon, Kwon Su ; Seo, Seung Jun ; Lim, Jae Hong ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 301~306
DOI : 10.7742/jksr.2015.9.5.301
X-ray can be applied to obtain a projection image of an object. It is not easy to obtain an high quality image for the object composed of low and high density materials. For the object with large difference in density, it is possible to realize high contrast image using images of low and high tube voltages and image processing. The plastic and metalic parts of the electronic components can be imaged by the dual energy technique which use low and high tube voltages and by processing pixel-by-pixel using visual C++. The contrast-enhanced image can be used to detect and observe defects within the electronic components.
Artifacts Improvement by using the Echo Planar Imaging and Pre-Saturation Pulse Band techniques of Reduced Field-Of-View in Breast Magnetic Resonance Imaging Examination
Lee, Jaeheun ; Kim, Hyunjin ; Im, Inchul ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 307~314
DOI : 10.7742/jksr.2015.9.5.307
This study was conducted in reducing the involuntary motion artifacts because of lungs and heart movements as well as the aliasing artifacts generated during the use of the reduced-FOV EPI technique while performing breast MRI. Performed on a total of 38 obesity female subjects who visited the clinic for pre-examination before surgery within the period from August 1 to November 30, 2014. The 3.0T MRI scanner equipped with a breast scanning coil. Qualitative and quantitative analyses were each used for the evaluation of the acquired images while an Paired T-test and Wilcoxon rank test were performed to check the statistical significance. The variation ratio rose by 15.69% with the additional application of a pre-saturation pulse in the lesion, by 13.72% near the lesion, and 20.63% in the fat and the contrast-to-noise ratio rose by 10.58% in and near the lesion and by 12.03% in the lesion and fat, respectively. there were increases of 22.05% and 21.42% at 0 and 1000 respectively in qulitative evaluation and growth of 16.10% in apparent diffusion coefficient. it showed a statistically significant result(p<0.05) in signal to noise ratio, contrast to noise ratio, diffusion slope coefficient and apparent diffusion coefficient. The involuntary movements artifacts that occur in the phase encoding direction and the aliasing artifacts are considered to be reduced to obtain the best image in the additional use of the pre-saturation pulse as DWI is acquired.
Diagnostic Usefulness of Quantitative Sensory Test Comparison with Photoplethysmography
LEE, Sang-Bong ; SEO, Jeong-Hyeok ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 315~322
DOI : 10.7742/jksr.2015.9.5.315
The purposes of this study were to compare the sensitivities of two tests, QST(quantitative sensory test)and PPG(photoplethysmography) in normal adults. We evaluated the sensory thresholds of QST and PPG and diabetes mellitus test in 17 normal adults. The finding of this study can be summarized as follow :The diagnostic sensitivities of QST was similar to PPG. There is a direct correlation between the amount of Blood sugar and parasympathetic nerve in ANS. Concluded that the QST might be complement to NCS for early of diabetic polyneuropathy. A new diagnostic approach, QST was introduced and exploited for diagnosis. This study provides support for PPG performed a ANS analysis.
Dose Distribution of Wedge filter by Dose Rate in LINAC
Gwon, Taehyeong ; Kim, Seunguk ; Yoon, Yonghak ; Won, Doyeon ; Jeong, Kyeonghwan ; Jung, Jaeeun ; Cho, Juneho ;
Journal of the Korean Society of Radiology, volume 9, issue 5, 2015, Pages 323~329
DOI : 10.7742/jksr.2015.9.5.323
This study is aimed at assessing whether dynamic wedge filters are appropriate to be used instead of physical wedge filters. The X-ray energy generated from linear accelerator is commercialize 6 MV and 10 MV.
of physical wedge filter was irradiated by dose rate 100, 200, 300, 400, 500, and 600 MU/min for each angle and for comparison with a dynamic wedge filter, irradiate 96 times under the same conditions. The measurement conditions are as 100 cm source-film distance and
irradiated surface. A developed film was scanned and analyzed after a calibration through a dose analysis program and the dose rate was compared after calculating the standard deviation. Dynamic wedge filters make dose, scattered rays and treatment time reduced and very useful due to less irradiated doses to patients. The errors at each dose rate under the same conditions were irrelevant. Thus, treatment based on a high dose rate depending on the patient is expected to be feasible.