Lee J N, Riederer S J
Magn Reson Med. 1986 Feb;3(1):132-4. doi: 10.1002/mrm.1910030119.
In equations describing multiple spin-echo pulse sequences, the T1 dependence is often approximated by a saturation-recovery expression, which is valid only when the repetition time TR is much greater than the time required for the echoes. A slight modification of this approximation greatly increases its accuracy for small TR values.
在描述多个自旋回波脉冲序列的方程中，T1依赖性通常用饱和恢复表达式来近似，该表达式仅在重复时间TR远大于回波所需时间时才有效。对该近似进行轻微修改可大大提高其在小TR值时的准确性。
