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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
The Study of Grashey Method Viewing the Glenohumeral(shoulder) Joint
Lee, Jaeseob ; Kim, Youngjae ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 331~335
DOI : 10.7742/jksr.2015.9.6.331
Consideration of Glenohumeral joint's image with the Changed Body angle of the Glenohumeral joint's Oblique Position in Erect Position. Glenohumeral joint's of Grashey method is a shoulder oblique method available to view the shoulder joint. Grashey method projects AP view of the Glenohumeral joint's so that the Humerus head's subluxation or joint degeneration can be easily visualized. However in this view, the patients, erect position, have to keep their body obliquely. Oblique position is will be needed to get the good quality Glenohumeral joint's view. Therefore, we thought of examining a method which shows the Glenohumeral joint's well by angling the patient one side upward in erect position. For this study, total 20 subject with no history of neurological or psychiatric illness, were recruited for examinations. They consisted of 13 mails and 7 femails, Statistic group analysis was performed with ANOVA test. Score of the evaluation of the expects were
, and they were significant(P<0.05). The degree of
views were shown to yield good quality shoulder oblique images.
Study on Image Quality and Radiation Dose due to the Arm Position in the Abdomen/Pelvis CT
Lee, Jongwoong ; Won, Doyeon ; Jung, Jaeeun ; Kim, Hyeongyun ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 337~342
DOI : 10.7742/jksr.2015.9.6.337
The one-year-follow-up test of abdomen/pelvis from 10 patients who were scanned more than twice a years were analyzed the radiation dose and image quality depend on the position of the arm retrospectively from January to December in 2013. There were classified two groups, group A was examined with raising an arm on standard position and group B was performed with lowering an arm, respectively. Group A of an average mAs from the first dose amount was shown 11.4% less compared to Group B. And the value of CTDI from Group B also was investigated 11.3% less. To compare the quality comparison of the second image as histogram value, the value of max from both of two groups was measured similarly. However, a big difference was shown from the value of min and SD, the short dose was appeared depends on the position of arm even though Group A was radiated more than Group B. Less exposure to the medical image quality only by working CT scan when the examiner actively raise the arm before the development and testing of high-end equipment introduction of complex algorithms for obtaining an optimized image will be provided to the patient.
Clinical Analysis of Inverse Planning for Radiosurgery ; Gamma Knife Treatment Plan Study
Jin, Seong Jin ; Je, Jae Yong ; Park, Cheol Woo ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 343~348
DOI : 10.7742/jksr.2015.9.6.343
The purpose of this study is a comparison of forward planning(FP) and inverse planning(IP) of a radiosurgery procedure. 10 patients of acoustic schwannoma MR image were used for treatment plan. FP-1,2 and IP were established under the same condition. FP and IP were compared by number of shot, conformity index(CI), paddic conformity index(PCI), gradiant index(GI) and treatment time. On average the treatment plan produced by IP tool provided an improved or similar CI, PCI, GI and reduced treatment time as compared to the FP (CI;FP-1:0.85, FP-2:0.86, IP:0.94, PCI;FP-1:0.79, FP-2:0.81, IP:0.78, GI;FP-1:2.94, FP-2:2.94, IP:3.01). The inverse planning system provides a clinically useful plan while reducing the planning time and treatment time.
The Application of TW3 method for Prediction about Bone Age in Hand AP Image of Children
Lee, Jinsoo ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 349~356
DOI : 10.7742/jksr.2015.9.6.349
The study is to recognize the interactions with bone ages by measuring the length between the end of the bone and the growth plate on selected highest weight of regions of seven for bone maturity in TW3 method. The experiment is subjected on seventy-two children (36 males, 36 females) who have examined the growth plate test from March, 2014 to March, 2015 and implemented a regression analysis by measuring the length between the end of the bone and the growth plate in Hand AP image of the children. In result, each bone age has produced a mean value and a standard deviation corresponding to the specific range and as bone age increases the length between the end of the bone and the growth plate decreased. In addition, female children showed lower mean value in comparison to male and also the measurement of the length between the end of the bone and the growth plate and its bone age are shown to be statistically valid(p<0.001) according to the results of regression analysis using its result value. Therefore, the probability of prediction on the bone age read off through the applied TW3 method and regression equation in the Hand AP image of the children.
The Study on Usefulness of the Standardized Information of Nuclear Medicine Scan in Function Evaluation of the Salivary Glands
Pyo, Sungjai ; Han, Jaebok ; Choi, Namgil ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 357~362
DOI : 10.7742/jksr.2015.9.6.357
This study was to evaluate the usefulness through the comparison of patients group and healthy control group by acquiring a variety of functional parameters index from time-activity curves of salivary gland scan using 99mTc-pertechnetate. From December 2014 to February 2015, had the targets of 30 patients with dry mouth and 10 people in healthy control group underwent the salivary gland scan. After intravenous injection of 370 MBq of 99mTc-pertechnetate, Vitamin C powder stimulation was administerd orally at 20 min and then 10 minutes were taken scan. The method of quantitative analysis was as follows, the time-activity curve was drawn after the parotid gland and submandible gland were prescribed as a region of interest, a variety of function parameters index was obtained in each position of the curve, and the patients group and the control group were compared. As for the methods applied in comparison and measurement, uptake ratio (UR), time at maximum counts (Tmax), time at minimum counts (Tmin), maximum accumulation (MA), accumulation velocity, maximum secretion (MS), maximum stimulation secretion (MSS), and secretion velocity (SV) were used. In the comparison of functional parameters index of patient group and normal group, the healthy normal group showed significant difference compared to the patient group in all indices except for the minimum radioactivity time (Tmin), and also in terms of variation over time the normal group showed significant difference compared to the patient group (p<0.05). Consequently, it was considered that the quantitative analysis that used a variety of function parameters index would be useful for evaluating the function of the salivary glands of the patients with dry mouth as an objective and standardized information.
Structural Design of Digital Radiography Detector using Hybrid Method for the Improvement of Response Property by X-ray
Kim, Kyo-Tae ; Han, Moo-Jae ; Kim, Jin-Seon ; Heo, Ye-Ji ; Oh, Kyung-Min ; Park, Ji-Koon ; Nam, Sang-Hee ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 363~367
DOI : 10.7742/jksr.2015.9.6.363
Digital radiography is divided into the direct method using photoconductor and indirect method using phosphor based on the principles in acquiring the image information, but both have different advantages and disadvantages. Therefore, this study conducted a preliminary research on the structure of the hybrid detector that combined phosphor and photoconductor to improve the sensitivity of X-ray. As a result, when the tube voltage was adjusted at 30ms of exposure time, the direct structure displayed an overall excellent sensitivity, but at the exposure time of 50ms or more, the hybrid structure displayed a better outcome. This seems to have enough research value considering that various clinical examinations usually include 50ms or more exposure time.
Texture Feature Analysis Using a Brain Hemorrhage Patient CT Images
Park, Hyonghu ; Park, Jikoon ; Choi, Ilhong ; Kang, Sangsik ; Noh, Sicheol ; Jung, Bongjae ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 369~374
DOI : 10.7742/jksr.2015.9.6.369
In this study we proposed a texture feature analysis algorithm that distinguishes between a normal image and a diseased image using CT images of some brain hemorrhage patients, and generates both Eigen images and test images which can be applied to the proposed computer aided diagnosis system in order to perform a quantitative analysis for 6 parameters. And through the analysis, we derived and evaluated the recognition rate of CT images of brain hemorrhage. As the results of examining over 40 example CT images of brain hemorrhage, the recognition rates representing a specific texture feature-value are as follows: some appeared to be as high as 100% including average gray level, average contrast, smoothness, and Skewness while others showed a little low disease recognition rate: 95% for uniformity and 87.5% for entropy. Consequently, based on this research result, if a software that enables a computer aided diagnosis system for medical images is developed, it will lead to the availability for the automatic detection of a diseased spot in CT images of brain hemorrhage and quantitative analysis. And they can be used as computer aided diagnosis data, resulting in the increased accuracy and the shortened time in the stage of final reading.
Determination of the Effective Energy of X-Ray Beam Using Optically Stimulated Luminescent nanoDot Dosimeters
Kim, Jongeon ; Lee, Sanghun ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 375~379
DOI : 10.7742/jksr.2015.9.6.375
The purpose of this study is to determine the effective energy of a polyenegetic X-ray beam. The half value layer(HVL) of aluminum for 80 kVp X-ray beam was measured by using optically stimulated luminescent nanoDot dosimeters(OSLnDs). The linear attenuation coefficient(
) was calculated using the measured HVL. And the mass attenuation coefficient(
) was obtained by dividing the linear attenuation coefficient by the density(
) of aluminum. The effective energy(
) of the obtained mass attenuation coefficient was determined using data of the X-ray mass attenuation coefficients for photon energies of aluminum given by National Institute of Standards and Technology(NIST). As a result, the HVL value is 2.262 mmAl. The
. And the
value was determined at 29.79 keV.
A Study on Perception by examinees of the Primary Health Care institutions about Exposure to Radioactivity
Yeo, Jin-Dong ; Jeon, Byeong-Kyu ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 381~392
DOI : 10.7742/jksr.2015.9.6.381
The purpose of this study was to investigate factors of perception by inpatients of the Primary Health Care institutions about exposure to radioactivity at the time of radioactive examination, providing basic information for making educational materials aimed to change their perception. Most of those patients, 65.5% responded that CT was a type of radioactive examination bringing highest exposure to radiosensitivity. Most of the subjects, 56.1% said that a body part most vulnerable to exposure to radiosensitivity was the genital gland at the time of radiosensitivity examination. And most of the participants, or 26.3% responded that they obtained information about radiation from TVs or newspapers. Among the surveyed patients, men were higher in scores for factors of the perception of radiation such as recognition of radiation, harmfulness of radiation, psychological state at the time of radioactive examination, prevention of exposure to radioactivity and necessity of radiation that women were, with statistically significant differences between the two groups. These findings suggest that it is urgently needed to develop an education program which helps patients better perceive exposure to radioactivity and that radiologists should be very careful to reduce the does of that exposure. If patients better perceive radiation, they would be less anxious and less exposed to radioactivity when receiving the radioactive examination.
A Study of Clinical Model for Radiation Therapy in Lung Cancer Patients of Busan and South Gyeongnam Province
Son, Jongki ; Kim, Yunjin ; Jo, Deokyoung ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 393~401
DOI : 10.7742/jksr.2015.9.6.393
Radiation therapy for lung cancer is an effective treatment during monotherapy or combination therapy. Studies have reported that the optimum utilization rate of radiation therapy is estimated at 61% to 74%. Radiation therapy in Korea has been investigated to be low; further studies are needed. This study was intended to assess the appropriateness of the use of radiation and to reveal the use of radiation therapy-related factors by examining radiation therapy in lung cancer patients of Busan and South Gyeongnam Province. This study was aimed at the population diagnosed with lung cancer in Busan and South Gyeongnam Province. To conduct the study, 1036 patients enrolled in two hospitals were collected and 897 appropriate as subjects were selected. We compared the optimum utilization rate and actual rate of radiation therapy, and revealed the adequacy and related factors for use of radiotherapy. Of 897 patients, 503 (56%) were treated with medical therapy and 394 (44%) were given radiotherapy. The radiotherapy utilization rate of all lung cancer patients was 42%. The proportion of non-small cell lung cancer by histologic type was 33% and that of small cell lung cancer was 90%. Factors related to radiation therapy used in cancer were age, histological type, clinical stage, doctor refereed to, and clinical examination. Compared to radiation utilization by region (site), curative chest therapy was 42%; palliative treatment was 26%. In the comparison of histologic types, utilization of small-cell lung cancer is lower; the lowest especially in the stage III. Utilization of radiation therapy in Busan and South Gyeongnam Province was lower than the reasonable one. Utilization difference could be explained by patient factors, tumor factors, and health service factors. To improve utilization,development ofoutreach service programs and activation of the multidisciplinary team are required.
Removal of Ring Artifact in Computed Tomography
Chon, Kwon Su ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 403~408
DOI : 10.7742/jksr.2015.9.6.403
Hard X-ray has been widely used in medical and industrial fields because it can be applied to observe the inside of a sample. Computed tomography provides sectional images of the sample through the reconstruction of the projection images. The quality of sectional images strongly depends on that of projection images. Ring artifact appeared on the seconal image can be made by the abnormal pixels of the detector used. In this study, we examine the ring artifact ratio in the circle phantom as a function of detection error of the detector used in computed tomography. The ring artifact increased with the increment of detection error under parallel and fan beam geometries and strongly increased near the center of rotation. The corrections, dead pixel and flat field corrections, for the images taken with the detector are required before the image reconstruction process to reduce the ring artifact in the computed tomography.
The Cognition and Practice of Infection Control in Dental Workplace
Lee, YunHui ; Choi, SungMi ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 409~416
DOI : 10.7742/jksr.2015.9.6.409
This study is to examine the infection management cognition and to practice of dental hygienists about their general characteristics, type of workplace. 354 dental hygienists in Daegu and Kyungbuk cities. The questionnaire survey was performed from April to May, 2015. These showed that factors of dental infection management according to workplace depended existence and nonexistence that chief of station and program of infection management, education of infection control(p<.001). Also cognition of dental infection control according to workplace drawed the protection individual(p<.05), asepsis procedure(p<.01), control of dental equipment(p<.001), control of infectious waste(p<.01) and laundry(p<.001), to practice of dental infection control according to workplace drawed the protection individual and asepsis procedure(p<.001), methods of disinfected and sterilized(p<.05), control of dental equipment and laundry(p<.001), control of infectious waste(p<.05). As above results, in order to minimize the infection prevention in the dental clinic, the regular infection control education for infection control of dental hygienists required, infection control guidelines place at the dental office.
Comparison of Linear-Quadratic Model, Incomplete-Repair Model and Marchese Model in Fractionated Carbon Beam Irradiation
Choi, Eunae ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 417~420
DOI : 10.7742/jksr.2015.9.6.417
We obtained Surviving Fraction (SF) after irradiation carbon beam to compare the applicability of the Linear-Quadratic model, Incomplete Repair model, Marchese model. Mathematica software(ver 9.0) used to calcurate parameters and compared result. LQ model could not explain the entire response of fractionated carbon beam irradiation. It becomes necessary to construct models that extend the LQ model of conventional radiotherapy for the carbon beam therapy. By combining both Potentially Lethal Damage Repair (PLDR) and Sublethal Damage Repair (SLDR) a new LQ model can develop that aptly modeled the cellular response to fractionated irradiation.
Radon Concentration at N-Kindergarten in G-City
Park, Yun ; Kim, Wonjun ;
Journal of the Korean Society of Radiology, volume 9, issue 6, 2015, Pages 421~424
DOI : 10.7742/jksr.2015.9.6.421
In this study, To subject the constructed at N-kindergarten in G-city, the position is closed window and opened window was measured using a measuring instrument for radon. The measured results indicate that the measurement was carried out in concentrations of radon gas measured at N-kindergarten is low than United States in the radon concentration in air public 4pCi called radon gas baseline maximum allowable concentrations. As a result, radon exposure is not a problem, but when the accumulation radon gas in the lungs, get damaged same lung cancer. Be defensive of kindergarten windows open for ventilation and dust removal be possible to reduce the exposure.