Carpenter K D, Macaulay S E, Schulte S J, Obregon R G, Nelson R C, Simon H E, Schmiedl U P
Department of Radiology, Veterans Administration Medical Center, Seattle, WA 98108, USA.
J Magn Reson Imaging. 1996 Jul-Aug;6(4):596-602. doi: 10.1002/jmri.1880060407.
To compare liver lesion detection rates, tissue signal and noise data, and qualitative parameters for breath-hold (BH) and non-breath-hold (NBH) hybrid rapid acquisition with relaxation enhancement (RARE) and conventional spin-echo (CSE) T2-weighted (CSE-T2) MR sequences, 20 patients were imaged using all three sequences. Lesion detection rates were 73.5% for the CSE-T2 sequence and 81.1% and 88.6% for the BH-RARE and NBH-RARE sequences, respectively (P = .027). Mean lesion-to-liver signal-difference-to-noise ratio for the NBH-RARE sequence was 14.0 +/- 11.5, significantly greater than 9.8 +/- 7.8 obtained for the BH-RARE sequence (P = .050) and 9.0 +/- 6.2 obtained for the CSE-T2 sequence (P = .015). The NBH-RARE sequence demonstrated fewer artifacts and greater overall image quality compared to the CSE-T2 sequence. The NBH-RARE sequence is a useful alternative to the liver signal-difference-to-noise ratio and lesion detection rate and better overall image quality.
为比较屏气（BH）和非屏气（NBH）混合快速采集弛豫增强（RARE）序列与传统自旋回波（CSE）T2加权（CSE-T2）磁共振序列的肝脏病变检出率、组织信号和噪声数据以及定性参数，对20例患者使用这三种序列进行成像。CSE-T2序列的病变检出率为73.5%，BH-RARE和NBH-RARE序列的病变检出率分别为81.1%和88.6%（P = 0.027）。NBH-RARE序列的平均病变与肝脏信号差异噪声比为14.0±11.5，显著高于BH-RARE序列的9.8±7.8（P = 0.050）和CSE-T2序列的9.0±6.2（P = 0.015）。与CSE-T2序列相比，NBH-RARE序列的伪影更少，整体图像质量更高。NBH-RARE序列在肝脏信号差异噪声比、病变检出率及整体图像质量方面是一种有用的替代方法。
