The sensitivity of low flip angle RARE imaging
The sensitivity of low flip angle RARE imaging
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DOI：
10.1002/mrm.1910370206
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发表时间：
1997-02-01
影响因子：
3.3
通讯作者：
Alsop, DC
中科院分区：
文献类型：
--
作者：
Alsop, DC
证明了Carr-Purcell-Meiboom-Gill （CPMG）序列的稳定性反映了在没有T-2和T-1衰变的情况下Bloch方程的稳态解的存在。然后用稳态理论评价了具有恒定和最优变化再聚焦角度的低翻转角RARE成像序列的性能。该理论在幻影中进行了实验验证，然后进行了优化，使用低翻转角度的单镜头RARE从正常志愿者的大脑中获得无伪影图像。
It is demonstrated that the stability of the Carr-Purcell-Meiboom-Gill (CPMG) sequence reflects the existence of a steady state solution to the Bloch equations in the absence of T-2 and T-1 decay. The steady state theory is then used to evaluate the performance of low flip angle RARE imaging sequences with both constant and optimally varied refocusing flip angles. The theory is experimentally verified in phantoms and then optimized, single shot, low flip angle RARE is used to obtain artifact-free images from the brain of a normal volunteer.