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A Study for possibility of Diagnostic Indicators by measuring the Fingertip Temperature after Cooling Load in Raynaud's Patients (레이노 환자의 한랭 부하 후 손가락 끝 온도 측정을 통한 진단 보조지표의 가능성 연구)

  • Chang, Ho-Suk;Heo, Yeong-Cheol
    • Journal of the Korean Society of Radiology
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    • v.13 no.2
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    • pp.283-290
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    • 2019

  • The purpose of this study is to suggest a quantitative supplementary index for patients with suspected Raynaud phenomenon. The subjects were 99 patients with suspected Raynaud phenomenon, 48 patients with low likelihood, 16 patients with middle range and 35 patients with high range. The test was instilled in ice water at $15.2{\pm}0.8^{\circ}C$ for 10 minutes of both hands and then venous injected of 99m-Tc 370 Mbq(10 mCi). After 5, 10 and 20 minutes, temperature changes of both fingers were measured. As a result, the temperature of the fingers was $32.6{\pm}4.9^{\circ}C$ in patients with a low diagnostic probability of Raynaud syndromes and $22.7{\pm}6.0^{\circ}C$ for those with a high diagnostic probability(p<0.05). In conclusion, we could confirm the difference of Raynaud phenomenon and finger temperature, and confirmed the possibility of secondary diagnosis as a quantitative index of Raynaud's diagnosis.

  • https://doi.org/10.7742/jksr.2019.13.2.283 인용 PDF KSCI HTML

Optimal Design of 6.6kV-200A DC Reactor Type High-Tc Superconducting: Fault Current Limter (6.6kV-200A급 DC 리액터형 고온초전도한류기의 최적설계)

  • 서호준;이승제;고태국
    • Progress in Superconductivity and Cryogenics
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    • v.4 no.1
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    • pp.99-104
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    • 2002

  • This study deals with the optimal design of a DC reactor type high-Tc superconducting fault current limiter(SFCL). The condition in which the cost function is minimized under given constraints is one of the things to be first considered in developing SFCLS. This condition is a group of the values corresponding to the variables the cost function depends on. In this paper, the length of tape was taken as a dependent variable, the inductance of DC reactor and the turns ratio of magnetic core reactors as independent variables. For the SFCL available at the level of 6.6kV-200A, we examined 4 cases; at the fault times of 80msec, 50msec, 30msec and 10msec. Since thyristors would be utilized instead of diodes, we chose the result at 10msec as the basic data. Considering safety factor 30%, our optimal design was decided to be the inductance 570mH, the critical current over 620A, the turns ratio 0.89 and the fault time within 20msec.

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