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- 저자 : 정용안 ( Yong An Chung ) (검색결과 38 건)
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Tc-99m Pertechnetate / TI-201 감영 신티그라피에서 부갑상선 선종으로 오인된 흉선종 1 예
정용안(Yong An Chung),유이령(Ie Ryung Yoo),김성훈(Seong Jang Kim),정수교(Soo Kyo Chung),왕영필(Young Pil Wang),정지한(Ji Han Jung),이교영(Kyo Young Lee),김병기(Byung Kee Kim) 대한핵의학회 2001 핵의학 분자영상 Vol.35 No.4
A large superior mediastinal mass was found incidentally by ultrasonography in a 60-year-old man. There was an abnormal accumulation of Tl-201 in the lower pole of left thyroid gland, extending into left superior mediastinum on Tc-99m pertechnetate/Tl-201 subtraction scan. Laboratory findings relating thyroid and parathyroid were all within normal range. We considered the mass as a non-functioning parathyroid adenoma tentatively. However, subsequent surgery and pathologic examination revealed the mass to be a benign mixed thymoma. We report a case of patient with thymoma showing unusual Tc-99m pertechnetate/Tl-201 subtraction imaging and laboratory findings, and suggest to consider the possibility of other mediastinal tumors rather than parathyroid adenoma. (Korean J Nucl Med 2001;35:274-279)
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백지희,이성용,김성훈,정용안,김범수,송하헌,정수교,강시원,박용휘,신경섭 ( Jee Hee Baek,Sung Yong Lee,Sung Hoon Kim,Yong An Chung,Bum Soo Kim,Ha Hun Song,Soo Kyo Chung,Si Won Kang,Yong Whee Bahk,Kyung Sub Shinn ) 대한핵의학회 1997 핵의학 분자영상 Vol.31 No.4
To evaluate the pinhole scintigraphic findings and its significance, authors retros- pectively compared the pinhole bone scintigrams and corresponding radiograms of 16 lesions in 14 patients with fibrous dysplasia. They were diagnosed pathologically in 10 lesions and radiologically in 6 lesions. The mean age of patients was 41.1 years. The mean interval between two studies was 1.1 days. Locations were ribs 7, pelvic bone 4, clavicle l, long bones 4(femur 2, titbia 1, humerus 1). The radiographic findings were as follows :the central portions were radiolucent(n=9), ground-glass opacities(n=5) or sclerotic(n=2) and the peripheral appearance were sclerotic rim(n-5), septation(n=7), cortical perforation (n=10) and invisible cortical thinning(n=9). Pinhc>le scintigraphic findings were as follows : Central portions showed normal 1+ uptake in 6 cases(radiolucent 5, ground-glass opacity 1), slightly increased 2+ uptake in cases(radiolucent 4, ground-glass opacity 3), and marked 3+ uptake in,3 cases(ground-glass opacity 1, sclerotic 2). The 15 of 16 lesions showed more intense uptake in the peripheral portion : slightly increased 2+ uptake corresponding to the sclerotic rim(5/5) and unvisible cortical thinning(1/9), and irregular foci of marked 3 + uptake corresponding to septation(7/7), cortical perforation(10/10) and invisible cortical thinning (8/9). One of 16 lesions showed homogeneous 2t uptake. In conclusion, pinhole scintigram provides information on regional activity of the fibrous dysplasia, which would be helpful in diagnosis, prediction of prognosis and determination of treatment plan.
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역상 액체 크로마토그래피에서 이동상 조성의 함수로서 taxol 의 분리도
정용안(Yong An Jung),정성택(Sung Taik Chung),노경호(Kyung Ho Row) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.5
The separation of taxol from cephalomannine and 10-decetyltaxol, in extract from yew trees was studied by an isocratic reversed-phase high performance liquid chromatography(RP-HPLC) with the mobile phase consisted of water, acetonitrile, and methanol. The compositions in mobile phase were varied to an increment of 5 % of acetonitrile and/or methanol and the resolulions of cephalomannine/taxol and taxo1/10-deacetyltaxol were measured by fifteen experimental runs. Using the experimental results, each resolution was fitted to the correlation equation as a function of mobile phase composition. The best correlation equation contained the linear and interaction terms of mobile phase composition. The optimized range for the resolution of the three components was determined by the resolution and separation time. The extraction from yew tree was separated with the mobile phase composition of 56/39/5(water/acetonitile/methanol, vol.%) in the optimized range. The calculated resolution from the correlation equation was in good agreement with the experimental one.
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