Title: Application and Optimization of Fluid-Attenuated Inversion Recovery Pulse Sequencce in Hepatic FocaL Lesions
Abstract: Objective:To discuss the optimal parameters of fast FLAIR sequences imaging and to find out an optimal value for FLAIR imaging in differentiating hepatic focal lesions.Methods:The expermental in vitro study were designed as follows:six groups with different concentration of hemoglobin(embedded in containers) and five groups with different concentration of hepatic cyst liquid(also embedded in containers),were respectively scanned with a 0.5T superconductive MR scanner using conventional T_2WI and FLAIR imaging(TR 6000ms,TE 100ms,TI 1500/1700/1900ms) sequences.Examination and evaluation of MR signal intensity of the same contents with different concentration on T_2WI images and those with various TI values in FLAIR sequence were performed.Results:The experimental in vitro study showed that increased signal intensity was shown in case that the protein concentration in the fluid was increased(1.64g/dl) and a tendency of gradual increase in signal intensity was also demonstrated in case of increasing the delay of TI.The differentiation between hepatic cyst and hemangioma could be made possible by FLAIR imaging with an optimal TI value(TI 1700ms,P0.05).Conclusion:Fast FLAIR MR imaging was preliminarily proved uesful in evaluating protein concentration in fluid and the capability of differentiating various liver diseases might be improved by FLAIR imaging with optimal parameters and in combination of the findings with SE sequence.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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