• 대한디지털의료영상학회논문지
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• 제15권1호
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• pp.47-54
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• 2013

This study evaluated the apron quality management and shield efficiency in the education laboratory for radiology students. For making a proposal of effective control of lead apron, Eighteen aprons, used in 4 university laboratories of dae-gu, Kyungpook area, were analyzed regarding their uniformities, transmission doses, lead equivalent and shield efficiencies. In conclusion, the lead apron uniformity was generally good. Also, the shield efficiency corresponding to lead equivalent was high. However, the quality control of lead apron was not satisfactory. Since there is a potentially possible chance for students to be exposed to a radiation during practical radiation-training in the education laboratory, the quality-control maintenance of the lead apron should be unceasingly maintained for the radiation protection.

• Journal of Gastric Cancer
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• 제3권1호
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• pp.1-3
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• 2003

• 대한위암학회:학술대회논문집
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• 대한위암학회 2002년도 제14회 추계학술대회
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• pp.37-40
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• 2002

• The Korean Journal of Pain
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• 제7권2호
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• pp.137-154
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• 1994

• 대한방사선기술학회지:방사선기술과학
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• 제34권4호
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• pp.287-296
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• 2011

급변하는 의료환경에 적응할 수 있는 현장실무형 인재양성을 위해 방사선(학)과 학생들을 대상으로 임상 실습교육의 만족도를 조사하였다. 조사 대상자는 학제에 따라 3년제와 4년제 학생 302명을 대상으로 설문을 실시하였다. 수집된 자료는 SPSS/PC+ Win 13 버전을 사용하여 분석하였다. 첫째, 일반적 특성 분포와 임상 실습 특성은 빈도분석, 둘째, 변인에 따른 임상실습 만족도 차이는 일원분산분석, 셋째, 변인 간 관계는 단순 적률상관관계로 분석하였다. 임상실습교육과 관련하여 실습과목의 도움, 지도자의 전문성, 실습내용, 실습환경, 실습시간, 실습 후 평가, 그리고 실습 전반에 대한 만족도 분석 결과, 실습 전반에 대한 만족도가 가장 높았고, 임상실습 내용, 시간 순이었다. 그리고 임상실습교육 만족도 관련 요인들은 높은 상관관계를 지니는 것으로 분석되었다.

• 대한디지털의료영상학회논문지
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• 제14권2호
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• pp.1-8
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• 2012

Purpose : We aim at presenting the optimum radiologic factor through the evaluation of dose variation and of image quality through the use of a grid in Humerus examination and the change of dose because of the change of radiologic factor. Materials and Methods : We divided it in 3 cases: when using a grid or not and when using IP(Image Plate) in a digital system. Also, as fixing kVp to 70kVp it changed mAs, and fixing mAs to 10 it changed kVp, we put up resolution chart and Burger rose phantom on the acrylic phantom of 7cm (the same level of Humerus) to evaluate the dose and image. We used Image J program to evaluate the quantitative resolution of the obtained image, and made the qualitative evaluation and statistical analysis of the image saved in PACS for 20 radiologic technologist with more than 10 years of experience in order of evaluate its contrast. We used SPSS10(SPSS Inc. Chicago, Illinois) for statistical analysis. Results : We observed the analytic result of resolution by the change of kVp that it was $4.539dGycm^2$ in 60kVp and $757.472dGycm^2$ in 75kVp, which increased about 64.6% of dose, while for the resolution it had the pixel value 30.7% better with 851 in 60kVp than 651 in 75kVp. Also, we analyzed the result of resolution by the change of mAs that it was $3.106dGycm^2$ in 5mAs, and $12.470dGycm^2$ in 20mAs, which increased about 400% of dose, while for the resolution DR had 678 in 5mAs, and 724 in 20mAs that increased about 6.8% of resolution. We made the qualitative evaluation of contrast by the change of kVp that DR showed the higher quality than CR, but the contrast by the change of kVp had no special different at the moment of visual evaluation, nor statistically significant difference(P>0.05). We observed the qualitative evaluation of contraste by the change of mAs that the contrast increased as DR increased mAs, and had statistically significant difference(P<0.05). On the other hand, CR had no significant difference for more than 10mAs nor statistically significant difference(P>0.05). Conclusion : In case of some patients with radiographic exposure by the repeated examination such as emergent patient or Follow up patient, they are considered to try to limit the use of a grid, to set kVp under 65kVp in fixed mode, to select less than 10mAs and to reduce the possibility of patient being bombed.

• Journal of Korean Neurosurgical Society
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• 제29권7호
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• pp.899-903
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• 2000

Objective : Object : A 7-year retrospective clinical and MRI study was reviewed to evaluate the characteristics of pineal cyst. We evaluated results of clinical and radiologic change of pineal cyst during follow up period. Patients and Methods : From 1992 to 1999, 50 patients with pineal cyst were visited for evaluation. Follow up clinical information was obtained from patients or clinical record through phone conversation. also radiologic findi-ngs of pineal cyst in mid-sagittal MRI were reviewed in detail. Results : Pineal cysts were usually asymptomatic and detected incidentally during evaluation of other diseases. Sagittal MRI is the most useful diagnostic test. The radiologic findings of pineal cyst were isointensity on T1WI comared to CSF and slightly high signal intensity on T2WI. Cyst wall was variably enhanced on Gad-enhanced T1WI. The average size of cyst was $13.9{\times}13.0mm$. The pineal cyst was classified into five groups according to previous report. Long term behavior of these lesions are not apparent, but in our study they showed no specific changes in clinical and radiological aspects during 25 months. Conclusion : Although long-term follow up results are needed, the pineal cyst are considered as normal variants. In our 25 months follow up results, there was no rapid change of cyst both clinically and radiologically. Therefore, frequent radiologic evaluation seems unnecessary except type III pineal cyst.

• 대한두경부종양학회:학술대회논문집
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• 대한두경부종양학회 2005년도 제10차 춘계학술대회
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• pp.81-85
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• 2005

• Journal of Chest Surgery
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• 제25권12호
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• pp.1416-1421
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• 1992

There are many objective indices of operative outcome of funnel chest, but there has been only a few report about the postoperative change of these indices and which is best correlated with subjective outcome. From January 1989 to December 1991, 74 patients with funnel chest underwent Ravitch operation and radiologic evaluation was performed on the twenty patients whose operative outcome were satisfactory by Humphreys` criteria and postoperative chest X-ray were available. Variable radiologic chest idices such as deformity grade [DG], lower vertebral index [LVI], upper vertebral index [UVI] and configuration index [CI] were measured preoperatively and 1, 6, 12 and 18 months pos-toperatively. The mean value of preoperative DG, LVI, UVI and CI were 5.32, 0.3, 0.26 and 1.01 respectively, and postoperative chages were as follows; DG; 3.13, 3.66, 3, 72, 4.0, LVI: 0.22, 0, 24, 0.25, 0.25 UVI; 0.27, 0.27, 0.27, 0.27 CI; 0.69, 0.77, 0.76, 0.79. The increments of CI were within the 90 percent confidence limit of normogram in most cases, but it was not true for LVI and UVI. And the differences between the observed and expected values of CI did not change significantly through the postoperative periods, which was not the case in LVI. We concluded from these results that 1] DG, LVI and CI were increased slowly during the postoperative follow up periods but the increments of CI were usually within the normal limits and so 2] CI can be used as a objective index of satisfactory outcome.

• Hip & pelvis
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• 제34권4호
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• pp.211-218
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• 2022

Purpose: We report on the 10-year clinical hip function and radiologic outcomes of patients who underwent hip arthroplasty using a COREN stem. Materials and Methods: A consecutive series of 224 primary cementless hip arthroplasty implantations were performed using a COREN stem between 2009 and 2011; among these, evaluation of 128 hips was performed during a minimum follow-up period of 10 years. The mean age of patients was 65.4 years (range, 40-82 years) and the mean duration of follow-up was 10.8 years (range, 10-12 years). Evaluation of clinical hip function and radiologic implant outcomes was performed according to clinical score, thigh pain, and radiologic analysis. Results: Dramatic improvement of the mean Harris hip score (HHS) from 59.4 preoperatively to 93.5 was observed at the final follow-up (P≤0.01). Stable fixation was demonstrated for all implants with no change in position except for one case of Vancouver type B2 periprosthetic femur fracture. A radiolucent line (RLL) was observed in 16 hips (12.5%). Thigh pain was observed in only two hips (1.6%) at the final follow-up. There were no cases of osteolysis around the stem. The survival rate for the COREN stem was 97.7%. Conclusion: Good long-term survival with excellent clinical and radiological outcomes can be achieved using the COREN femoral stem regardless of Dorr type.