Relaxation effects on transverse magnetization using RF pulses long compared to T(2).
Relaxation effects on transverse magnetization using RF pulses long compared to T(2).
复制标题
与 T(2) 相比，使用较长的 RF 脉冲对横向磁化强度具有弛豫效应。
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
U. Klose
中科院分区：
文献类型：
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作者：
A. Raddi;U. Klose
研究了在优化的切片选择性Shinnar-Le Roux脉冲的应用过程中发生的横向弛豫效应。纵向和横向磁化的行为进行检查，重点关注影响吸收和色散分量的变化。除了振幅的减少，吸收分量被发现是不受横向弛豫时间，而色散分量强烈扭曲。给出了相同长度不同带宽脉冲的失真分量的比较。
The transverse relaxation effects which occur during the application of optimized slice-selective Shinnar-Le Roux pulses are studied. The behavior of both longitudinal and transverse magnetization is examined, focusing the attention on changes which affect the absorption and dispersion components. Besides the reduction in amplitude, the absorption component was found to be unaffected by transverse relaxation times, whereas the dispersion component was strongly distorted. A comparison between the distortion components from pulses having same length but different bandwidths is given.