Magnetic field homogenization of the human prefrontal cortex with a set of localized electrical coils.

Magnetic field homogenization of the human prefrontal cortex with a set of localized electrical coils.
复制标题

人类前额叶皮层与一组局部电气线圈的磁场均匀化。

DOI:
10.1002/mrm.22164
复制
发表时间:
2010-01
影响因子:
3.3
通讯作者:
de Graaf, Robin A.
de Graaf, Robin A.
中科院分区:
医学3区
文献类型:
--
作者:
Juchem, Christoph;Nixon, Terence W.;McIntyre, Scott;Rothman, Douglas L.;de Graaf, Robin A.

文献摘要

参考文献

被引文献

相似文献

由于前额叶在工作记忆和认知控制中的作用,前额叶皮质是精神病学和神经科学中常见的靶向大脑结构。充气的鼻窦和人头额部的组织/骨骼之间磁化率的巨大差异导致了前额叶皮质的强烈和高度局部化的磁场焦点。因此,在磁共振成像中会出现图像失真和信号丢失的现象。提出了一套外部电子线圈,在前额叶皮质提供局部和高幅度的填充场,当与常规的0到2阶球面谐波填隙相结合时,对大脑的其余部分影响最小。新填补方法的实验实现强烈地最小化甚至消除了在4特斯拉功能磁共振中通常使用的设置下采集的梯度回波图像中的信号丢失。
The prefrontal cortex is a common target brain structure in psychiatry and neuroscience due to its role in working memory and cognitive control. Large differences in magnetic susceptibility between the air-filled sinuses and the tissue/bone in the frontal part of the human head cause a strong and highly localized magnetic field focus in the prefrontal cortex. As a result, image distortion and signal dropout are observed in MR imaging. A set of external, electrical coils is presented that provides localized and high amplitude shim fields in the prefrontal cortex with minimum impact on the rest of the brain when combined with regular zero-to-second order spherical harmonics shimming. The experimental realization of the new shim method strongly minimized or even eliminated signal dropout in gradient-echo images acquired at settings typically used in functional magnetic resonance at 4 Tesla.
DOI: 10.1002/hbm.10062
发表时间: 2002-11-01
影响因子: 4.8
作者:
Smith, SM
通讯作者: Smith, SM
DOI: 10.1016/j.mri.2003.08.027
发表时间: 2003-12-01
影响因子: 2.5
作者:
Ugurbil, K;Adriany, G;Zhu, XH
通讯作者: Zhu, XH
DOI: 10.1002/mrm.10626
发表时间: 2003-11-01
影响因子: 3.3
作者:
Wilson, JL;Jezzard, P
通讯作者: Jezzard, P
DOI: 10.1016/0091-6749(92)90161-t
发表时间: 1992-09-01
影响因子: 14.2
作者:
WAGENMANN, M;NACLERIO, RM
通讯作者: NACLERIO, RM
DOI: 10.1016/s1053-8119(03)00073-9
发表时间: 2003-06-01
期刊: NEUROIMAGE
影响因子: 5.7
作者:
Deichmann, R;Gottfried, JA;Turner, R
通讯作者: Turner, R