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RISS 인기검색어
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- 저자 : Yang Na-Re (검색결과 2 건)
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Seo Dong-Min,조용재,Yang Na-Re 대한말초신경학회 2021 The Nerve Vol.7 No.2
Objective: The main purpose of this study was to evaluate the clinical and radiologic factors of disc height loss in spontaneous resolution of herniated lumbar disc patients.Methods: From January 2017 to December 2018, a total of 56 symptomatic herniated lumbar disc patients (36 men and 20 women) were investigated retrospectively in this study. Clinical findings including age, sex, pain, and smoking history were examined in each group (group A, patients with not-changed disc heights; group B, patients with decreased disc heights). Radiologically, the level, severity, laterality, modic change, and disc degeneration of lumbar disc herniation were investigated between groups. We compared demographic and radiologic findings between groups.Results: A total of 56 patients were enrolled (group A, 30 patients; group B, 26 patients). There were no significant statistical differences in age, sex, visual analog scale (VAS) scores, level of disc herniation, and laterality of disc herniation between groups. Group A had more protrusion cases (14/30 cases) and group B had more Sequestration (11/26 cases). About Modic change and disc degeneration classification, group B had more modic change cases and more disc degeneration cases than group B.Conclusion: In this study, there were no significant differences in demographic findings, level of disc herniation, the status of disc herniation, laterality of disc herniation, VAS of back pain between group A and group B.
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Real Time On-line Quality Assurance System for HDR Brachytherapy
이수진,이레나,이병용,임상욱,최진호,Lee Su Jin,Lee Re Na,Yi Byang Yang,Lim Sang Waak,Choi Jin Ho Korean Society of Medical Physics 2004 의학물리 Vol.15 No.3
고선량률 후 장착 근접치료 과정에서의 필수적인 정도 관리(QA) 과정은 Ir-192 선원 위치의 정확성을 검증하는 것이다. 눈금자나 방사선 사진(autoradiograph), 비디오 모니터(video monitor) 등을 이용한 여러 방법들이 Ir-192 선원의 위치적인 오차를 점검하기 위해 사용됨이 보고되고 있다. 본 논문에서는, fluorescent screen 과 CMOS (Complementary Metal Oxide Semiconductor) PC 카메라를 이용하는 방법을 새로운 고선량률 근접치료의 정도 관리 (QA) 도구로 사용할 수 있는 가능성에 대해 연구하였다. 계획된 dwell position 과 그 측정값은 1 mm 이내에서 일치함을 보였고, dwell time의 정확성은 0.4초 이내였다. 이번 연구의 결과는 CMOS PC 카메라를 사용하여 새롭게 제작된 정도 관리(QA) 시스템이 선원의 위치와 dwell time점검이 실시간으로 가능한 정도 관리(QA) 도구로 사용될 수 있음을 보여준다. An essential quality assurance (QA) procedure in high dose rate (HDR) remote after-loading brachytherapy is that of the verification of the Ir-192 HDR source positioning accuracy. A number of methods using mechanical rulers or autoradiograph and video cameras have been reported to check the positional error of the Ir-192 source. In this study, the feasibility of a CMOS (Complementary Metal Oxide Semiconductor) PC camera, with a fluorescent screen, was investigated. The agreement between the planned and measured dwell position was better than 1 mm and dwell times better than 0.4 sec. Our results indicate that the CMOS PC camera system could be used as a QA tool for the on-line determination of the source position and dwell time.
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