Saturated double-angle method for rapid B1 plus mapping
Saturated double-angle method for rapid B1 plus mapping
复制标题
DOI：
10.1002/mrm.20896
复制
发表时间：
2006-06-01
影响因子：
3.3
通讯作者：
Nayak, Krishna S.
中科院分区：
文献类型：
--
作者：
Cunningham, Charles H.;Pauly, John M.;Nayak, Krishna S.
对于高场 (>= 3 T) 下的体内磁共振成像，必须考虑有效 B 场 (B-1+) 的均匀性，特别是在使用表面线圈进行射频传输时。提出了一种用于高速 B-1+ 星等测绘的新方法。它将双角度方法与 B-1 不敏感磁化重置序列相结合，使得重复时间 (TR) 的选择与 T 无关，并通过多切片分段（螺旋）采集在几秒钟内实现具有足够空间分辨率的体积覆盖。模型实验证实了该技术的准确性，即使在 TR
For in vivo magnetic resonance imaging at high field (>= 3 T) it is essential to consider the homogeneity of the active B, field (B-1+), particularly if surface coils are used for RF transmission. A new method is presented for highly rapid B-1+ magnitude mapping. It combines the double angle method with a B-1-insensitive magnetization-reset sequence such that the choice of repetition time (TR) is independent of T, and with a multislice segmented (spiral) acquisition to achieve volumetric coverage with adequate spatial resolution in a few seconds. Phantom experiments confirmed the accuracy of this technique even when TR