재발성 뇌실내출혈을 일으킨 경연수접합부 동정맥기형 - 증례보고 -

이상원,최창화,차승헌,박동준,송근성,이영우,Lee, Sang Weon,Choi, Chang Hwa,Cha, Seung Heon,Park, Dong June,Song, Geun Sung,Lee, Young Woo 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.6

Cervicomedullary junction arteriovenous malformation(AVM) is extremely rare. The authors present a case of a cervicomedullary junction AVM in a 31-year-old woman presenting with recurrent intraventricular hemorrhage (IVH). Magnetic resonance imaging revealed the AVM(of a size of approximately $2{\times}2.5{\times}4cm$) extending from a lower medulla to C2-3 level. Vertebral angiography demonstrated a tightly coiled vascular mass with multiple feeders (radiculomedullary arteries) and irregular-shaped aneurysm at distal part of feeder originating at right C-1 level. The patient underwent superselective embolization of upper nidus and the aneurysm. The pertinent literature is reviewed, and diagnostic and therapeutic implications are discussed.

전두골에 발생한 콜레스테롤 육아종 1례 - 증례보고 -

이상원,차승헌,박동준,송근성,최창화,이영우,Lee, Sang Weon,Cha, Seung Heon,Park, Dong June,Song, Geun Sung,Choi, Chang Hwa,Lee, Young Woo 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.6

Cholesterol granuloma of frontal bone is a rare disease which usually occurs at the lateral part of the supraorbital ridge. This expanding lesion grows slowly and extends into the orbit and anterior cranial fossa. The most common symptom is proptosis. This granuloma is composed of a granulomatous reaction surrounding cholesterol crystals. Surgical treatment involves aspiration of contents and stripping or curettage of the lining which is highly successful. We experienced a case of cholesterol granuloma of frontal bone with huge intracranial extension, which was cured by surgical removal. The clinical features, radiologic, and pathologic finding were discussed and the pertinent literatures were reviewed.

퇴행성 경추질환에서 전방경유 추간판 절제술 및 골유합술의 결과분석

이상원,송근성,Lee, Sang Weon,Song, Geun Sung 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.2

Objectives : We retrospectively studied the efficacy of anterior cervical discectomy and interbody fusion without plate fixation in degenerative cervical disease. Methods : Thirty two consecutive patients with degenerative cervical disease treated by decompression and interbody fusion(Smith-Robinson technique) without anterior cervical plating were studied for postoperative complication rate as well as the clinical and radiologic outcomes and were compared the result of ours with other reported series where the anterior cervical plating was used. Results : All cases were reviewed after average period of 13 months for the purpose of this study. There were 4 postoperative complications related to grafting. A solid fusion was obtained in all cases with single-level fusion(n=21) and 81.8 % of the cases with a two-level fusion(n=11). The overall fusion rate was 93.8 % and fusion rate per level fused was 95.3%. The clinical outcome of the patients was comparable with that in the literature, with one patient having a poor result. Comparing the result of this study with others of the anterior cervical plating, clinical outcome and fusion rate were not superior in plate fixation group in single-level fusion, but increased fusion rate and decreased graft-related complication rate were noted in multilevel fusion with plate fixation. However, the clinical outcome was not superior to noninstrumented fusion group of this study. Conclusion : These results demonstrate that anterior cervical discectomy and interbody fusion(Smith-Robinson technique) without instrumentation is safe and reliable method of single-level fusion in degenerative cervical disease. Plate fixation system doesn't seem necessary in single level fusion in degenerative cervical disease.

객체지향 데이타모델에서 다중사례화를 위한 버전개념 확장

이상원(Sang-Weon Lee),김형주(Hyoung-Joo Kim) 한국정보과학회 1994 정보과학회논문지 Vol.21 No.2

We propose a multilevel secure object-oriented data model, MORION First, we provide several security policies guaranteeing legal information flows in object-oriented data model. Second, in order to support polyinstantiation efficiently, we identify a new semantic relationship, poly-from, extend the version semantics. We also provide two new security policies and discuss an efficient storage sharing mechanism for polyinstantiated versions. Finally, we use methods as implementation mechanism of security policies. It is advantage of MORION that it fully utilizes version and method concept to support multilevel security. 본 논문에서는 다단계보안 객체지향 데이타모델 MORION을 제시한다.첫째, 객체지향 데이타모델에서 올바른 정보 흐름을 보장하는 보안정책들을 제시했다. 둘째, 다중사례화 현상을 지원하기위해 새로운 의미관계 poly-from을 정의하고 이를 객체지향 데이타모델에서 지원하기 위해 버전 개념을 확장했다. 이와 관련 하여 두가지 새로운 보안정책을 제시하고 버전들사이의 효율적인 기억장소 공유방안을 언급했다. 마지막으로, 메소드를 이용한 보안정책 구현을 다루었다. MORlON의 장점은 기존 객체지향 데이타 모델의 버전과 메소드 개념을 확장해서 다단계보안을 자연스럽게 지원하는 것이다.

논문 : 단재소설의 인물 고찰

이상원(Sang Weon Lee) 문창어문학회 1983 문창어문논집 Vol.20 No.-

삼차신경통과 반측안면경련에서 CISS 영상의 진단적 유용성

이동훈,이상원,최창화,Lee, Dong Hoon,Lee, Sang Weon,Choi, Chang Hwa 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.2

Objectives : Trigeminal neuralgia and hemifacial spasm are caused by vascular compression of the REZ(root entry or exit zone) of the 5th and the 7th cranial nerve. Preoperative detection of neurovascular compression is essential for accurate diagnosis, appropriate treatment, and the good operative results. Three dimensional Fourier Transformation-Constructive Interference in Steady State(3DFT-CISS) images are known to give good contrast between CSF, nerve, and vessels. We applied a 3DFT-CISS imaging technique for the preoperative evaluation of patients with these diseases and estimated the diagnostic accuracy and usefulness of this study. Methods : A series of 71 patients with trigeminal neuralgia and hemifacial spasm were treated by microvascular decompression. Among them 34 patients with trigeminal neuralgia and 24 patients with hemifacial spasm had preoperative CISS images. We compared the radiologic finding with the operative finding, and analysed the diagnostic usefulness of 3DFT-CISS imaging. Results : The sensitivity of CISS images of detecting the neurovascular compression was 90.3% in trigeminal neuralgia and 100% in hemifacial spasm. There were one false-positive and three false-negative cases in trigeminal neuralgia, and one false-positive case in hemifacial spasm. The accuracy in diagnosing the causative vessel was 73.5% in trigeminal neuralgia and 83.3% in hemifacial spasm. Conclusion : CISS image is very useful diagnostic tool for preoperative evaluation of neurovascular compression in patients with trigeminal neuralgia and hemifacial spasm. No additional neuroradiologic examination other than CISS image and MRA is needed for preoperative evaluation of patients with trigeminal neuralgia and hemifacial spasm.

내시경적 생검 및 제 3 뇌실 개창술과 감마나이프 방사선 수술로 치료된 시상부 교종

조원호 ( Won Ho Cho ),이상원 ( Sang Weon Lee ),이동훈 ( Dong Hoon Lee ),차승헌 ( Seung Heon Cha ),송근성 ( Geun Sung Song ),최창화 ( Chang Hwa Choi ) 대한뇌종양학회·대한신경종양학회·대한소아뇌종양학회 2005 대한뇌종양학회지 Vol.4 No.2

We present the case of a thalamic glioma with obstructive hydrocephalus. The patient was successfully treated with neuroendoscopic biopsy, third ventriculostomy and subsequent gamma knife radiosurgery. At 12 months the tumor has decreased in size and the patient has no neurologic deficits. Neuroendoscopic surgery combined with gamma knife radiosurgery may play an important role in the selected intracranial tumors with minimally invasive technique.

원발병소불명의 전이성 뇌종양

전진호 ( Jin Ho Jeon ),이상원 ( Sang Weon Lee ),최병관 ( Byung Kwan Choi ),차승헌 ( Seung Heon Cha ),송근성 ( Geun Seung Song ),최창화 ( Chang Hwa Choi ) 대한뇌종양학회 2003 대한뇌종양학회지 Vol.2 No.2

Background:The prognosis of patients with brain metastasis of unknown primary tumor is controversial. The authors reviewed the results of gross total resection with radiotherapy in this group of patients. Methods:Between 1993-2000, 133 patients admitted to the study department for the treatment of metastatic brain tumor. Gross total resection was done in 33 patients with single brain lesion. Ten patients had solitary brain metastasis without a detectable primary site despite extensive systemic evaluation(Group I), and remaining 23 had previous cancer history or a detectable primary lesion(Group II). Survival analysis and comparison was done. Results:The median survival was 24.1months in group I(range, 6.5-58.5) and 19.0months in group II(range, 4.7- 40.6). The overall survival for group I was better than group II, but not significant. Adenocarcinoma was the most common histology of group I. During the follow-up the primary tumor was found in 7 patients and was located in the lung in 4 patients. Conclusion:Brain metastasis of unknown primary tumor has better prognosis than that of brain metastasis in general. Gross total resection with radiotherapy for local disease control is effective in this group of patients especially in solitary lesion.

객체지향 기법을 이용한 SQL 처리기 설계와 구현

송용준(Yong-Jun Song),이상원(Sang-Weon Lee),안정호(Jung-Ho Ahn),김형주(Hyoung-Joo Kim) 한국정보과학회 1995 정보과학회논문지 Vol.22 No.1

데이타베이스 질의처리기를 설계하고 구현할 때 성능, 확장성, 그리고 표준에의 적합성을 고려해야 한다. 본 논문은 확장성과 재사용성을 장점으로 하는 객체지향 개념을 이용해 SQL의 질의 처리기를 설계 및 구현한 내용, SQL 표준에 대한 적합성 평가, 상용 데이타베이스 시스템인 INFORMIX와 성능 비교결과를 다루고 있다. 이와 같이 객체지향적으로 설계 및 구현된 SQL 처리기는 정보중복의 제거, 구현의 편의, 확장성 등의 많은 장점을 갖는다. Performance. extensibility, and conformance are important issues in designing and implementing a database query processor. This paper describes the object-oriented design and object-oriented implementation of SQL processor using object-oriented concept, and shows the results of its conformance test and performance comparison with a commercial relational database management system, INFORMIX. SQL processor implemented in this paper has a number of advantages, such as avoidance of information redundancy, ease of implementation, and extensibility.

흉부 전산화 단층 촬영 검사 시 발생하는 생식선 차폐 유무에따른 산란 선량 차이에 관한 연구

곽종혁(Jong Hyeok Kwak),김성진(Gyeong Rip Kim),성현철(Hyun Chul Sung),김승원(Seung Won Kim),송근성(Geun Sung Song),최민경(Min Gyeong Choi),이상원(Sang Weon Lee) 한국방사선학회 2021 한국방사선학회 논문지 Vol.15 No.2

생식선 차폐를 하지 않았을 때 전부, 양 측부, 후부, 생식선 부위의 산란선을 측정하고 Xenolite nolead Apron(0.35 mm Pb), Xenolite nolead Apron(front 0.35 mm Pb Mix back 0.25 mm Pb, Skirt overlap), Half Apron(0.5 mm Pb)로 차폐 후 각각의 산란 선량을 측정하였다. 흉부 전산화 단층촬영 검사 시 검사 부위의 산란 선량은 272 µ㏜가 측정되었고, Apron으로 차폐하지 않았을 시에 평균 전부 43 µ㏜, 좌측부 81 µ㏜, 우측부 82 µ㏜, 후부 38.8 µ㏜, Gonad 부위 16 µ㏜로 측정되었다. Xenolite nolead Apron으로 위쪽 부분만 차폐하고 측정했을 전부 11.2 µ㏜, 좌측부 43.1 µ㏜, 우측부 45.3 µ㏜, 후부 12 µ㏜, Gonad 부위 5.2 µ㏜로 측정되었다. Xenolite nolead Apron(Skirt overlap)으로 Pelvis 부위를 360˚ 감싼 후 선량을 측정하였을 때 전부 5.6 µ㏜, 좌측부 22.4 µ㏜, 우측부 15.7 µ㏜, 후부 6 µ㏜, Gonad 부위 3.2 µ㏜로 측정되었다. Xenolite nolead Apron(Skirt overlap)으로 Pelvis 부위를 360˚ 감싼 후 선량을 측정하였을 때 전부 5.6 µ㏜, 좌측부 22.4 µ㏜, 우측부 15.7 µ㏜, 후부 6 µ㏜, Gonad 위 3.2 µ㏜로 측정되었다. Half Apron으로 위쪽만 차폐하고 측정했을 때에는 전부 10.7 µ㏜, 좌측부 42.6 µ㏜, 우측부 40.6 µ㏜, 후부 11.3 µ㏜, Gonad부위 4.7 µ㏜로 측정되었다. 골반 부위를 360° 차폐하는 방법이 80% 이상 선량 감소를 보였고, 전부 차폐 시 70% 이상의 선량 감소 효과를 보였으며 모든 전산화 단층 촬영 검사에 있어 피폭선량 경감을 위한 연구와 차폐 가능한 장비를 활용하는 다양한 기법에 관한 지속적인 연구가 필요하리라 사료된다. his study is a study on the difference in dose according to the presence or absence of gonadal shielding of scattered rays generated during chest computed tomography examination, and the scattered dose of the examination site was measured by placing the RadEye G-10 device in the center of the phantom. When the gonads are not shielded, the scattering lines of the whole, both sides, posterior and gonads are measured and Xenolite nolead Apron (0.35 mm PB), Xenolite nolead Apron (front 0.35 mm PB Mix back 0.25 mm PB, Skirt overlap), Half Apron After shielding with (0.5 mm PB), each scattered dose was measured. During chest computed tomography, the scattered dose of the test site was measured at 272 µ㏜, and when not shielded with Apron, the average total was 43 µ㏜, left 81 µ㏜, right part 82 µ㏜, posterior part 38.8 µ㏜, and Gonad part 16 µ㏜. Became. Xenolite nolead Apron shielded only the upper part and measured all 11.2 µ㏜, left part 43.1 µ㏜, right part 45.3 µ㏜, posterior part 12 µ㏜ and Gonad part 5.2 µ㏜. Xenolite nolead Apron (Skirt overlap) covered the Pelvis area 360˚ and the dose was measured to be 5.6 µ㏜ in the whole, 22.4 µ㏜ in the left, 15.7 µ㏜ in the right side, 6 µ㏜ in the posterior part, and 3.2 µ㏜ in the Gonad part. Xenolite nolead Apron (Skirt overlap) covered the Pelvis area 360˚ and the dose was measured to be 5.6 µ㏜ in the whole, 22.4 µ㏜ in the left, 15.7 µ㏜ in the right side, 6 µ㏜ in the posterior part, and 3.2 µ㏜ in the Gonad part. When measuring only the upper part with Half Apron, the total measurement was 10.7 µ㏜, the left part 42.6 µ㏜, the right part 40.6 µ㏜, the posterior part 11.3 µ㏜, and the Gonad part 4.7 µ㏜. The method of 360° shielding of the pelvic area showed a dose reduction of more than 80%, and a dose reduction effect of more than 70% was shown when all shielding was performed. In all computerized tomography examinations, research to reduce the exposure dose and various shielding devices were used. It is believed that continuous research on the technique is needed.