Ropele S, Bammer R, Stollberger R, Fazekas F
Department of Neurology, Karl-Franzens University, Graz, Austria.
Magn Reson Med. 2001 Dec;46(6):1242-5. doi: 10.1002/mrm.1323.
A new pulse sequence for fast multislice T1 mapping is presented. This method is based on calculating T1 from spin echo (SE) and stimulated echo (STE) images obtained with different degrees of T1 weighting, and uses the interleaved acquisition scheme of the fast phase acquisition of composite echoes (FastPACE) technique. In contrast to the FastPACE technique, the two echoes are sampled separately. Experimental comparisons confirm that the new sequence layout overcomes most of the FastPACE restrictions, such as its motion sensitivity and the need for a fully complex data set. Moreover, this method offers a higher precision for long T1 values and a further reduction of acquisition time.
本文提出了一种用于快速多层面T1映射的新脉冲序列。该方法基于从具有不同T1加权程度的自旋回波（SE）和受激回波（STE）图像计算T1，并采用复合回波快速相位采集（FastPACE）技术的交错采集方案。与FastPACE技术不同，这两种回波是分别采样的。实验比较证实，新的序列布局克服了FastPACE的大多数限制，如运动敏感性和对完全复数数据集的需求。此外，该方法对于长T1值具有更高的精度，并进一步缩短了采集时间。
