Golden-angle radial sparse parallel MRI: combination of compressed sensing, parallel imaging, and golden-angle radial sampling for fast and flexible dynamic volumetric MRI.
Golden-angle radial sparse parallel MRI: combination of compressed sensing, parallel imaging, and golden-angle radial sampling for fast and flexible dynamic volumetric MRI.
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DOI：
10.1002/mrm.24980
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发表时间：
2014-09
影响因子：
3.3
通讯作者：
Otazo, Ricardo
中科院分区：
文献类型：
--
作者：
Feng, Li;Grimm, Robert;Block, Kai Tobias;Chandarana, Hersh;Kim, Sungheon;Xu, Jian;Axel, Leon;Sodickson, Daniel K.;Otazo, Ricardo
开发一种快速灵活的自由呼吸动态容积MRI技术，即迭代黄金角RAdial稀疏并行MRI（iGRASP），该技术结合了压缩感知、并行成像和黄金角径向采样。径向k-空间数据连续采集使用黄金角方案和排序到时间序列通过分组到时间帧的任意数量的连续辐条。然后，在欠采样的时间序列上执行迭代重建过程，其中通过沿时间维度沿着施加总变差约束来强制执行联合多线圈稀疏。所需的线圈灵敏度曲线从时间平均数据中获得。iGRASP实现了比单独的并行成像或逐线圈压缩感测更高的加速能力。它能够为各种临床应用提供具有高空间和时间分辨率的动态容积成像，包括成人和儿科患者腹部以及成人患者乳腺和颈部的自由呼吸动态对比增强成像。iGRASP提供的高性能和灵活性可以改善需要运动鲁棒性和同时高空间和时间分辨率的临床研究。
To develop a fast and flexible free-breathing dynamic volumetric MRI technique, iterative Golden-angle RAdial Sparse Parallel MRI (iGRASP), that combines compressed sensing, parallel imaging, and golden-angle radial sampling. Radial k-space data are acquired continuously using the golden-angle scheme and sorted into time series by grouping an arbitrary number of consecutive spokes into temporal frames. An iterative reconstruction procedure is then performed on the undersampled time series where joint multicoil sparsity is enforced by applying a total-variation constraint along the temporal dimension. Required coil-sensitivity profiles are obtained from the time-averaged data. iGRASP achieved higher acceleration capability than either parallel imaging or coil-by-coil compressed sensing alone. It enabled dynamic volumetric imaging with high spatial and temporal resolution for various clinical applications, including free-breathing dynamic contrast-enhanced imaging in the abdomen of both adult and pediatric patients, and in the breast and neck of adult patients. The high performance and flexibility provided by iGRASP can improve clinical studies that require robustness to motion and simultaneous high spatial and temporal resolution.
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影响因子：
3.3
作者：
Feng, Li;Srichai, Monvadi B.;Lim, Ruth P.;Harrison, Alexis;King, Wilson;Adluru, Ganesh;Dibella, Edward V. R.;Sodickson, Daniel K.;Otazo, Ricardo;Kim, Daniel
通讯作者：
Kim, Daniel
影响因子：
3.3
作者：
Buehrer, Martin;Pruessmann, Klaas P.;Kozerke, Sebastian
通讯作者：
Kozerke, Sebastian
影响因子：
3.3
作者：
Feng, Li;Otazo, Ricardo;Jung, Hong;Jensen, Jens H.;Ye, Jong C.;Sodickson, Daniel K.;Kim, Daniel
通讯作者：
Kim, Daniel
影响因子：
3.3
作者：
Adluru, Ganesh;Awate, Suyash P.;DiBella, Edward V. R.
通讯作者：
DiBella, Edward V. R.
影响因子：
3.3
作者：
Huang, F;Akao, J;Limkeman, M
通讯作者：
Limkeman, M