REAL-TIME MOVIE IMAGING FROM A SINGLE CARDIAC CYCLE BY NMR
REAL-TIME MOVIE IMAGING FROM A SINGLE CARDIAC CYCLE BY NMR
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DOI：
10.1002/mrm.1910050305
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发表时间：
1987-09-01
影响因子：
3.3
通讯作者：
MANSFIELD, P
中科院分区：
文献类型：
--
作者：
CHAPMAN, B;TURNER, R;MANSFIELD, P
使用1米口径的磁铁在0.1 T，全身横向图像，通过成人已获得在重复时间为57毫秒。所使用的技术是微小的变化回波平面成像（EPI）采用大脉冲梯度，以提供完全覆盖的平面相空间，和低角度的RF激励序列，允许快速重复的实验。此外，对梯度土壤进行主动磁屏蔽，以保护周围磁体免受大梯度场快速切换所引起的涡流影响。
Using a 1-m-bore superconductive magnet at 0.1 T, whole-body transverse images through adult humans have been obtained at repetition times of 57 ms. The techniques used were minor variations of echo-planar imaging (EPI) employing large pulsed gradients to provide complete coverage of the plane in phase space, and low-angle RF excitation sequences allowing rapid repetition of the experiment. In addition active magnetic screening of the gradient soils was implemented to protect the surrounding magnet from the eddy currents induced by the necessarily fast switching of the large gradient fields.