MRI diffusion tensor reconstruction with PROPELLER data acquisition
MRI diffusion tensor reconstruction with PROPELLER data acquisition
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DOI：
10.1016/j.mri.2003.08.001
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发表时间：
2004-02-01
影响因子：
2.5
通讯作者：
Gullberg, GT
中科院分区：
文献类型：
--
作者：
Cheryauka, AB;Lee, JN;Gullberg, GT
MRI 扩散成像可有效测量脑、心脏、肝脏和脊柱组织中的扩散张量。扩散张量断层扫描 MRI (DTT MRI) 方法基于根据张量场投影的测量来重建扩散张量场。投影是通过适当应用旋转扩散梯度来获得的。在本文中，结合 DTT MRI 检验了一种新型数据采集方案 PROPELLER（具有增强重建功能的周期性旋转重叠平行线）的潜力，以检验其扩散成像的能力和充分性。使用迭代重建算法通过适当的旋转扩散梯度从旋转扩散加权叶片重建扩散张量场。采用 PROPELLER 数据采集的 DTT MRI 在减少加权测量次数、避免重建扩散张量参数中的模糊性、提高信噪比以及减少信号失真的影响方面显示出巨大的潜力。 (C) 2004 Elsevier Inc. 保留所有权利。
MRI diffusion imaging is effective in measuring the diffusion tensor in brain, cardiac, liver, and spinal tissue. Diffusion tensor tomography MRI (DTT MRI) method is based on reconstructing the diffusion tensor field from measurements of projections of the tensor field. Projections are obtained by appropriate application of rotated diffusion gradients. In the present paper, the potential of a novel data acquisition scheme, PROPELLER (Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction), is examined in combination with DTT MRI for its capability and sufficiency for diffusion imaging. An iterative reconstruction algorithm is used to reconstruct the diffusion tensor field from rotated diffusion weighted blades by appropriate rotated diffusion gradients. DTT MRI with PROPELLER data acquisition shows significant potential to reduce the number of weighted measurements, avoid ambiguity in reconstructing diffusion tensor parameters, increase signal-to-noise ratio, and decrease the influence of signal distortion. (C) 2004 Elsevier Inc. All rights reserved.