SIMULTANEOUS SPATIAL AND SPECTRAL SELECTIVE EXCITATION
SIMULTANEOUS SPATIAL AND SPECTRAL SELECTIVE EXCITATION
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DOI：
10.1002/mrm.1910150211
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发表时间：
1990-08-01
影响因子：
3.3
通讯作者：
NISHIMURA, DG
中科院分区：
文献类型：
--
作者：
MEYER, CH;PAULY, JM;NISHIMURA, DG
利用小尖端激励的k空间解释，设计了一个同时具有空间选择性和谐振频率选择性的单一激励脉冲。导出了该脉冲响应的解析表达式。该脉冲已在1.5 t成像系统上实现。脉冲被应用于快速梯度回波成像序列，在屏气间隔内形成水和脂肪图像。这些快速图像没有器官边界的化学位移伪影，这通常会困扰传统的快速图像。该脉冲可以应用于各种其他序列，如多层水/脂肪序列和快速k空间扫描序列。
Using a k-space interpretation of small-tip excitation, a single excitation pulse has been designed that is simultaneously selective in space and resonant frequency. An analytic expression for the response of this pulse has been derived. The pulse has been implemented on a 1.5-T imaging system. The pulse has been applied to a rapid gradient-echo imaging sequence that forms both water and fat images within a breath-holding interval. These rapid images are free of the chemical shift artifacts at organ boundaries that typically afflict conventional rapid images. The pulse can be applied to a variety of other sequences, such as multislice water/fat sequences and rapid k-space scanning sequences.