Fast Spin Echo法を用いた呼吸停止T_1強調画像における肝実質SNR改善についての検討

概要

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On abdominal MRI, since priority is given to time shortening during scanning breath-hold imaging, the signalto-noise ratio (SNR) and resolution fall victim. We examined the RF power of the 90-degree pulse becomes the maximum signal of fat in T_1-weighted imaging, and liver with a long T_1 value was noted not to have reached the maximum signal compared with fat. That is, without sacrificing scanning time and resolution by adjusting RF output so that liver would become the maximum signal, it was considered that the SNR of liver substance could be improved. In the phantom experiment, the difference in RF power from which fat and liver became the maximum signal was 1 dB at TR 400 msec. Although a decrease of 10% or less in the fat signal was produced by adding this difference to the RF power obtained by automatic pre-scan, the SNR of liver substance was improved.
社団法人日本放射線技術学会の論文
2003-05-20