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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)
1,1,1 TCE 의 대체 세정제에 대한 세정 성능 비교
정용안,황영한,노경호 ( Yong An Jung,Young Han Hwang,Kyung Ho Row ) 한국공업화학회 1995 공업화학 Vol.6 No.6
Many alternatives to 1,1,1 TCE (1,1,1 trichloroethane) mainly used as cleaning solvent for metal parts are developed and commercialized because the solvent is scheduled to phaseout after 1996. Considering there are many kinds of parts and contaminants in metal cleaning, it is essential to investigating the characteristics and performance of the alternatives prior to use. For the contaminant of a cutting oil, Actrel 1047L and Solena vda which are the commercially available and promising alternatives were experimented at the same cleaning condition of 1,1,1 TCE to check the cleaning performance. The experimental results showed that the removal efficiency of 1,1,1 TCE was the lowest at the dipping cleaning condition, but it was better at the ultrasonic condition. Overally, the removal efficiency of Solena vda was better than that of Actrel 1047L for removing the cutting oil used in this experiment. But the small portion of spot was not entirely cleaned out with Solena vda, and its removal efficiency in terms of the number of experiments was worse than that of Actrel 1047L. Also trichloroethylene which is one of the conventional chlorinated solvents showed the smallest change in the removal efficiency.