Current Limiting and Recovery Characteristics Under Load of Transformer Type SFCL with Rewound Structure Using BSCCO Wire in Model Power System

AbstractWe have proposed new design of a transformer type SFCL with primary and secondary superconducting coils which has rewound structure. For not so large fault current, the proposed SFCL limits the current by the inductive component by the normal transition of the flux shielding coil (secondary), and for larger fault current, it can give the resistive component additively by the normal transition of the primary coil. The recovery characteristics under load condition and repetitive limiting operation were experimentally investigated in a laboratory scale power system. The SFCL limited twice repetitive faults current and recovered quickly under load condition

A Study of Correlation between Gd-EOB-DTPA-enhanced MRI Using the 3T MRI System and Tc-99m-GSA Hepatic Scintigraphy / Hepatic Function Tests in Prehepatectomy Cases

This study compared results from Gd-EOB-DTPA on two different phases of 3T MRI with those from Tc-99m-GSA hepatic scintigraphy and hepatic function tests. Twenty-four patients with liver tumor were included in this study. All patients underwent Gd-EOB-DTPA-enhanced-MRI and Tc-99m-GSA hepatic scintigraphy. Clearance index (HH15) and receptor index (LHL15) were calculated for the Tc-99m-GSA, while signal intensities (SI) of liver at pre-injection and at 4/20min post-injection, and of spleen at 4 min/20min were measured (SIpre, SI4min, SI20min, SIsp4min, SIsp20min, respectively) for the Gd-EOB-DTPA-MRI. Liver activity at 15min by Tc-99m-GSA scintigraphy or biochemical liver function values were compared with liver spleen contrast at 4min (LSC4min = SI4min/SIsp4min) or 20min post-injection (LSC20min = SI4min/SIsp20min), and the increase in ratio at 4min (IR4min=SI4min/SIsp4min) or 20min (IR20min= SI20min/SIpre). Total bilirubin levels (T-bil), serum albumin levels (Alb), prothrombin activity, and the indocyanine green clearance test (ICG) results were also analyzed. There were statistically significant correlations in all comparisons between Gd-EOB-DTPA and Tc-99m-GSA. The highest coefficient of correlation was obtained in IR4min (LHL15: r = 0.795, P<0.001; HH15: r = -0.782, P<0.001), with IR20min (LHL15: r = 0.690, P<0.01; HH15: r = -0.528, P<0.05), LSC4min (LHL15: r = 0.458, P<0.05; HH15: r = -0.626, P<0.05), and LSC20min (LHL15: r = 0.443, P<0.05, HH15: r = -0.609, P<0.05) also significantly correlated. Correlations in hepatic function data were observed between IR4min and T-bil/Alb, and IR20min and Alb. In 3T-MRI using Gd-EOB-DTPA, the SI of liver at pre- to post-injection (especially at 4 min) significantly correlated with the corresponding Tc-99m-DTPA scintigraphy results, and with some biochemical liver function data