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연부 조직 종양에서 PET의 유용성: 기존의 진단법과의 비교 연구
서성욱,박상민,조환성,Seo, Sung-Wook,Park, Sang-Min,Cho, Hwan-Seong 대한근골격종양학회 2005 대한골관절종양학회지 Vol.11 No.1
목적: 최근에는 연부 종양의 진단에 FDG-PET을 이용하기 위한 연구가 다양하게 이루어지고 있다. 그러나, 그 임상적 유용성에 대해서는 알려져 있지 않다. 이 연구의 목적은 기존의 진단법과 비교하여 FDG-PET의 유용성을 평가하는 데 있다. 대상 및 방법: 연구 대상은 2001년 3월에서 2002년 3월 사이에 연부 조직 종양으로 진단받은 29명의 환자(남자 16명, 여자 13명, 평균 47세)를 대상으로 하였다. 모든 환자군에서 기존의 검사법과 FDG-PET을 시행하였다. 타당성 검증에서 국소 병변은 모든 경우 조직검사로 판단하였고, 전이 병변은 조직 검사와 6개월 간의 추시 결과로 판단하였다. 각각의 진단은 독립적으로 시행되었으며, 진단의 정확도와 누적 비용-정확도율을 측정하였다. 결과: 국소 병변의 진단에서 MRI와 FDG-PET의 민감도, 특이도, 정확도는 각각 91%, 57%, 83% 와 95%, 43%, 83%이었다. 원격 전이의 진단에서 기존의 검사법과 FDG-PET의 민감도, 특이도, 정확도는 각각 77%, 89%, 87% 와 92%, 94%, 93%이었다. 누적 비용-정확도율은 145,000원/% 이었다. 종양의 등급별 민감도 분석에서 고등급의 종양이 가장 비용-효용성이 높았다. 결론: 국소부위의 재발과 잔존 종양의 진단에서 FDG-PET의 정확도는 MRI와 차이가 없었다. 반면, 원격 전이의 진단은 FDG-PET이 기존의 검사 보다 정확하였다. 고등급 종양의 경우 저등급 종양보다 FDG-PET의 유용성이 큰 것을 알 수 있었다. Introduction: Currently, F-18 fluorodeoxyglucose positron emission tomography scans (FDG-PET) has been investigated in soft tissue tumor especially for tumor detection and noninvasive grading. However, the validity and the efficacy of FDG-PET are still unclear in clinical evaluation. The purpose of this study is to determine the efficacy of FDG-PET in compared to conventional diagnostic imaging studies currently used in the soft tissue tumor. Methods: Between March 2001 and March 2002, 29 patients (sixteen males, thirteen females, mean age, 47 years; a range from 4 to 73) diagnosed with soft tissue tumor were evaluated by both conventional diagnostic imaging and FDG-PET. Valid reference test of the local lesion was the histopathologic diagnosis, which was measured in all patients. The suspecting metastasis in the imaging studies was validated by pathology or follow up imaging for at least 6 months. Each imaging diagnosis was made independently. The accuracy of each diagnostic method was evaluated. The incremental cost accuracy ratio was determined in each diagnostic method. Results: For detection of local lesion, sensitivity, specificity, and accuracy for MRI and FDGPET scans were 91%, 57%, 83% and 95%, 43%, 83% respectively. For detection of distant lesion, sensitivity, specificity, accuracy for conventional diagnostic methods and FDG-PET scans were 77%, 89%, 87% and 92%, 94%, 93% respectively. The incremental cost accuracy ratio (ICAR) of FDG-PET for detection of distant lesion was 145,000won/%. According to ICAR for each tumor grade, PET strategy is most cost-effective at high grade tumors. Conclusions: For detection of local lesion such as recurrence or remnant tumor, FDG-PET scan was not more accurate than MRI. However, It was more accurate for detection of metastatic lesion than conventional methods. For detection of high grade tumor, PET was most costeffective than for detection of lower grade tumor.
특집(特輯) 논문(論文): `10 춘계학술대회 우수 논문 : 나노입자 코팅 탄소섬유 강화 복합재료의 전기전도도 향상
서성욱 ( Seong Wook Seo ),하민석 ( Min Seok Ha ),권오양 ( Oh Yang Kwon ),최흥섭 ( Heung Soap Choi ) 한국복합재료학회 2010 Composites research Vol.23 No.6
복합재 항공기 동체의 낙뢰손상방지를 목적으로 탄소섬유에 인듐-주석 산화물(ITO) 나노입자를 코팅함으로써 탄소섬유강화플라스틱(CFRP) 복합재료의 전기전도도를 향상하였다. 탄소섬유에 코팅된 ITO 나노입자는 10~40%의 농도로 콜로이드 상태에서 분사되었다. CFRP의 전기전도도는 코팅 후 3배 이상 증가하였으며 현재 B-787 복합재 항공기 동체에 사용 중인 기술인 금속메쉬를 CFRP 외층에 매몰한 경우보다도 높은 전기전도도를 얻을 수 있었으며, 나노입자 코팅으로 섬유-기지 계면에 미치는 악영향은 발견되지 않았다. 모의 낙뢰에 의한 손상영역은 각각 다른 처리를 한 재료와 조건에 따라 초음파 C-scan 이미지로 확인하였다. ITO 40% 코팅 시편의 경우 전기전도도는 B-787 샘플의 경우보다 높았지만 낙뢰에 의한 손상영역의 크기는 거의 비슷한 수준이었다. The electrical conductivity of carbon-fiber reinforced plastics(CFRP`s) has been improved by indium-tin oxide (ITO) nano-particle coating on carbon fibers for the purpose of lightning strike protection of composite fuselage skins. ITO nano-particles were coated on the surface of carbon fibers by spraying the colloidal suspension with 10~40% ITO content. The electrical conductivity of the CFRP has been increased more than three times after ITO coating, comparable to or higher than that of B-787 composite fuselage skins with metal wire-meshes on the outer surface, without sacrificing the tensile property due to the existence of nano-particles at fiber-matrix interface. The damage area by the simulated lightning strike was also verified for different materials and conditions by using ultrasonic C-scan image. As the electrical conductivity of 40% nano-ITO coated sample surpass that of the B-787 sample, the damage area by lightning strike also appeared comparable to that of the materials currently employed for composite fuselage construction.
산소로 유도된 망막증 모델에서 트리암시놀론이 망막 혈관 관련 인자에 미치는 영향
유웅선,서성욱,박종문,유지명,정인영,Woong Sun Yoo,Seong Wook Seo,Jong Moon Park,Ji Myong Yoo,In Young Chung 대한안과학회 2012 대한안과학회지 Vol.53 No.12
Purpose: The present study investigated the effects of triamcinolone acetonide (TA) on retinal vessel-related factors and retinal vascular leakage in the retina of oxygen-induced retinopathy (OIR) rats. Methods: Sprague-Dawley rats used for OIR were exposed to hyperoxia from postnatal day 2 to day 14, then returned to normoxia from day 15 to day 30 and compared with control rats. On postnatal day 16, 2 μl of TA (4 mg/kg) was injected into the vitreous of the right eye in control and OIR rats. The Evans blue method was used for evaluating vascular leakage and RT-PCR was performed for confirmation of mRNA expression. Results: In OIR rats exposed to hyperoxia, retinal vascular permeability increased when returned to normoxia. After intravitreal injection of TA, vascular permeability was decreased in OIR rats, but no changes were found in control rats. In OIR rats, mRNAs of HIF-1α, VEGF, SDF-1 and ICAM-1 were more expressed and down-regulated after intravitreal injection of TA. Occludin mRNA level was decreased in the hypoxic condition and up-regulated after TA treatment. Conclusions: The present study suggests the ability of TA to inhibit retinal vascular leakage in OIR rats and a possibility that TA controls expression of the HIF-1, VEGF, SDF-1, ICAM-1 and Occludin, which may protect retinal vascular destruction from hypoxic conditions; further studies are necessary to confirm changes in protein levels.
메모리 친수성 아크릴릭 인공수정체의 백내장 수술 2년후 임상결과
김유리,서성욱,정인영,송준경,Eu Rie Kim,Seong Wook Seo,In Young Chung,Jun Kyong Song 대한안과학회 2007 대한안과학회지 Vol.48 No.3
Purpose: To evaluate the clinical results of thermoplastic, hydrophilic acrylic IOL CV232 (MemoryLens?, CIVA Vision, USA) to those of hydrophobic acrylic IOL AR40e (Sensar?, AMO, USA). Methods: Twenty patients had in-the-bag implantation of a MemoryLens? IOL in 1 eye and a Sensar? in the opposite eye in a randomized fashion after uneventful phacoemulsification. We evaluated the best corrected visual acuity (BCVA) and posterior capsule opacification (PCO) at a mean 30.05 months after surgery. Results: Two years postoperatively, a BCVA of 0.8 or better was found in 65% of the MemoryLens? group and in 60% of the Sensar? group. There was no statistically significant differences between the two groups (p>0.50). PCO developed in 55% in the MemoryLens? group and in 65% of the Sensar? group. Again, no statistically significant differences were found between the two groups (p>0.50). Conclusions: There were no significant differences between the two different intraocular lenses in BCVA or PCO postoperatively.
김체론,서성욱,박종문,유지명,한용섭,김선주,김성재,Che Ron Kim,MD,Seong Wook Seo,MD,PhD,Jong Moon Park,MD,PhD,Ji Myung Yoo,MD,PhD,Yong Seop Han,MD,Sunjoo Kim,MD,PhD,Seong Jae Kim,MD 대한안과학회 2011 대한안과학회지 Vol.52 No.11
Purpose: To report a case of fungal keratitis caused by Drechslera species. Case summary: A 77-year-old man visited our clinic complaining of left ocular pain and decrease of visual acuity for 1 week On slit-lamp examination, epithelial defect and stromal infiltration on the corneal center with numerous inflammatory cells in the anterior chamber were found. There was no improvement after routine antibiotic treatment. A corneal biopsy and culture were performed on the corneal lesion. The KOH smear study reported hyphae, thus the patient was treated with 0.25% amphotericin B, 0.2% fluconazole and 5% natamycin eye drops. A clinical improvement was observed on the corneal lesion and Drechslera species was identified by the culture study. Conclusions: The authors report an experience of fungal keratitis caused by Drechslera species. J Korean Ophthalmol Soc 2011;52(11):1366-1369