Accelerated multi-shot diffusion imaging.
Accelerated multi-shot diffusion imaging.
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DOI：
10.1002/mrm.24919
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发表时间：
2014-08
影响因子：
3.3
通讯作者：
Maier, Stephan E.
中科院分区：
文献类型：
--
作者：
Madore, Bruno;Chiou, Jr-yuan George;Chu, Renxin;Chao, Tzu-Cheng;Maier, Stephan E.
To reduce image distortion in MR diffusion imaging using an accelerated multi-shot method. The proposed method exploits the fact that diffusion-encoded data tend to be sparse when represented in the kb-kd space, where kb and kd are the Fourier transform duals of b and d, the b-factor and the diffusion direction, respectively. Aliasing artifacts are displaced toward under-utilized regions of the kb-kd plane, allowing non-aliased signals to be recovered. A main characteristic of the proposed approach is how thoroughly the navigator information gets utilized during reconstruction: The phase of navigator images is used for motion correction, while the magnitude of the navigator signal in kb-kd space is used for regularization purposes. As opposed to most acceleration methods based on compressed sensing, the proposed method reduces the number of ky lines needed for each diffusion-encoded image, but not the total number of images required. Consequently, it tends to be most effective at reducing image distortion rather than reducing total scan time. Results are presented for three volunteers with acceleration factors ranging from 4 to 8, with and without the inclusion of parallel imaging. An accelerated motion-corrected diffusion imaging method was introduced that achieves good image quality at relatively high acceleration factors.
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影响因子：
3.3
作者：
Tsao, J;Boesiger, P;Pruessmann, KP
通讯作者：
Pruessmann, KP
影响因子：
3.3
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3.3
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影响因子：
3.3
作者：
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通讯作者：
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