DOUBLE-ECHO MULTISLICE PROTON SPECTROSCOPIC IMAGING USING HADAMARD SLICE ENCODING
DOUBLE-ECHO MULTISLICE PROTON SPECTROSCOPIC IMAGING USING HADAMARD SLICE ENCODING
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DOI：
10.1002/mrm.1910310604
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发表时间：
1994-06-01
影响因子：
3.3
通讯作者：
LEIBFRITZ, D
中科院分区：
文献类型：
--
作者：
DREHER, W;LEIBFRITZ, D
使用具有多频选择性射频激励和切片方向哈达玛编码的脉冲序列以及面内方向的传统傅立叶相位编码，提出了同时多切片质子光谱成像（SI）。采用双回波数据采集来增加实验的光谱信息。对模型的测试证明了切片选择的质量。对健康大鼠大脑的体内测量结果表明，可以在 32 分钟内从四个切片中获得具有高信噪比的光谱。测量在 4.7 T 下进行，视野为 32 x 32 mm(2)，切片厚度为 3 mm，体素大小为 12 μl。所提出的方法是连续多层 SI 和 3D SI 的有用替代方法。此外，可以组合顺序和同时多切片 SI。
Simultaneous multislice proton spectroscopic imaging (SI) is presented using a pulse sequence with multifrequency selective RF excitation and Hadamard encoding in the slice direction, and conventional Fourier phase encoding in the in-plane directions. Double-echo data acquisition is used to increase the spectral information of the experiment. Tests on a phantom demonstrate the quality of the slice selection. Results of in vivo measurements on the healthy rat brain show that spectra with a high signal-to-noise ratio can be acquired from four slices within 32 min. The measurements were performed at 4.7 T using a field of view of 32 x 32 mm(2), a slice thickness of 3 mm, and a voxel size of 12 mu l. The proposed method is a useful alternative to sequential multislice SI and 3D SI. Furthermore, it is possible to combine sequential and simultaneous multislice SI.