Two-dimensional accelerated MP-RAGE imaging with flexible linear reordering
Two-dimensional accelerated MP-RAGE imaging with flexible linear reordering
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DOI：
10.1007/s10334-014-0430-y
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发表时间：
2014-10-01
影响因子：
2.3
通讯作者：
Stoecker, Tony
中科院分区：
文献类型：
--
作者：
Brenner, Daniel;Stirnberg, Ruediger;Stoecker, Tony
实现用于T1加权神经成像的加速磁化准备快速梯度回波（MP-MRI）序列;利用现代MRI技术在保持图像质量的同时最大限度地减少扫描时间。在配备32通道接收器阵列头部线圈的最新3 T MR扫描仪上实现自定义MP-MRI序列。该序列利用移位CAIPIRINHA k（y）-k（z）欠采样模式结合椭圆扫描和二维视图排序方案，在保持图像对比度的情况下实现高并行成像加速因子，可以表明，在两个k空间方向上加速的MP-TMS 320优于标准视图排序的常见做法-单向加速。CAIPIRINHA技术结合椭圆扫描进一步增加了这一优势。通过将MP-MRI与CAIPIRINHA采样和椭圆扫描相结合，扫描时间可从4-5 min缩短至2-3 min，而图像质量无明显降低。
Implementation of an accelerated Magnetization Prepared RApid Gradient Echo (MP-RAGE) sequence for T1 weighted neuroimaging; exploiting modern MRI technologies to minimize scan time while preserving the image quality.A custom MP-RAGE sequence was implemented on a state-of-the-art 3T MR scanner equipped with a 32-channel receiver array head coil. The sequence utilized a shifted CAIPIRINHA k (y) -k (z) under-sampling pattern combined with elliptical scanning and a two-dimensional view ordering scheme to achieve high parallel imaging acceleration factors at maintained image contrast.It could be shown that MP-RAGE accelerated in two k-space directions outperforms single direction acceleration, which is the common practice with standard view ordering. Applying the CAIPIRINHA technique in conjunction with elliptical scanning further increased this benefit.By combining MP-RAGE with CAIPIRINHA sampling and elliptical scanning, the scan time can be reduced from 4-5 min to 2-3 min with insignificant reduction in image quality.