Integrated parallel reception, excitation, and shimming (iPRES).
Integrated parallel reception, excitation, and shimming (iPRES).
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DOI：
10.1002/mrm.24766
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发表时间：
2013-07
影响因子：
3.3
通讯作者：
Trong-Kha Truong
中科院分区：
文献类型：
--
作者：
Han, Hui;Song, Allen W.;Trong-Kha Truong
开发一个硬件平台的新概念，实现集成并行接收、激励和调光（iPRES）。该概念使用单线圈阵列，而不是用于并行激励/接收和B0振荡的单独阵列。它依赖于一种新颖的设计，允许射频电流（用于激励/接收）和直流电流（用于B0振荡）在同一线圈中独立共存。概念验证的B0闪烁实验是在一个双线圈阵列的幻影中进行的，而B0闪烁模拟是在人脑中使用一个48线圈阵列进行的。我们的实验表明，在每个线圈上单独优化直流电流可以将B0均方根误差降低62-81%，并最大限度地减少回波平面图像的畸变。仿真结果表明，与静态二阶球谐调振相比，采用48圈iPRES阵列的动态调振可使前额叶和颞叶区域的B0均方根误差降低66-79%，与采用48圈传统调振阵列的动态调振相比，可降低12-23%。我们的研究结果证明了iPRES概念在统一线圈系统中执行并行激励/接收和B0闪烁的可行性，以及其在体内应用的前景。
To develop a new concept for a hardware platform that enables integrated parallel reception, excitation, and shimming (iPRES). This concept uses a single coil array rather than separate arrays for parallel excitation/reception and B0 shimming. It relies on a novel design that allows a radiofrequency current (for excitation/reception) and a direct current (for B0 shimming) to coexist independently in the same coil. Proof-of-concept B0 shimming experiments were performed with a two-coil array in a phantom, whereas B0 shimming simulations were performed with a 48-coil array in the human brain. Our experiments show that individually optimized direct currents applied in each coil can reduce the B0 root-mean-square error by 62–81% and minimize distortions in echo-planar images. The simulations show that dynamic shimming with the 48-coil iPRES array can reduce the B0 root-mean-square error in the prefrontal and temporal regions by 66–79% as compared to static 2nd-order spherical harmonic shimming and by 12–23% as compared to dynamic shimming with a 48-coil conventional shim array. Our results demonstrate the feasibility of the iPRES concept to perform parallel excitation/reception and B0 shimming with a unified coil system as well as its promise for in vivo applications.
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影响因子：
3.5
作者：
Ha, Seunghoon;Hamamura, Mark J.;Muftuler, L. Tugan
通讯作者：
Muftuler, L. Tugan
影响因子：
3.3
作者：
Vaughan, Thomas;DelaBarre, Lance;Ugurbil, Kamil
通讯作者：
Ugurbil, Kamil
DOI：
10.1016/j.jmr.2010.03.008
发表时间：
2010-06
期刊：
Journal of magnetic resonance (San Diego, Calif. : 1997)
影响因子：
--
作者：
Juchem C;Nixon TW;McIntyre S;Rothman DL;de Graaf RA
通讯作者：
de Graaf RA
DOI：
10.1016/j.pnmrs.2008.04.001
发表时间：
2009-02-01
影响因子：
6.1
作者：
Koch, Kevin M.;Rothman, Douglas L.;de Graaf, Robin A.
通讯作者：
de Graaf, Robin A.
影响因子：
3.3
作者：
Juchem, Christoph;Brown, Peter B.;de Graaf, Robin A.
通讯作者：
de Graaf, Robin A.