On B1 inhomogeneity correction of in vivo human brain glutamate chemical exchange saturation transfer contrast at 7T.

On B1 inhomogeneity correction of in vivo human brain glutamate chemical exchange saturation transfer contrast at 7T.
复制标题

DOI:
10.1002/mrm.24290
复制
发表时间:
2013-03-01
影响因子:
3.3
通讯作者:
Reddy, Ravinder
Reddy, Ravinder
中科院分区:
医学3区
文献类型:
--
作者:
Singh, Anup;Cai, Kejia;Haris, Mohammad;Hariharan, Hari;Reddy, Ravinder

文献摘要

参考文献

被引文献

相似文献

射频场(B1)不均匀性对体内人脑谷氨酸化学交换转移图的影响通常与化学交换饱和转移,直接饱和和磁化转移效应的贡献相混淆。因此,B1的化学交换饱和转移效果变化遵循复杂的功能,也取决于组织类型。在这项工作中,我们开发了一种新的B1不均匀性校正方法,基于与测得的B1映射结合使用的B1值的校准数据。通过这种方法,将得出不同的校准曲线,用于灰质和白色物质,而不是基于局部B1值的简单线性缩放。讨论了这种研究化学交换饱和转移转移的潜在扩展与其他代谢产物和组织类型的对比。
The effects of radio frequency field (B1) inhomogeneity on measured in vivo human brain glutamate chemical exchange saturation transfer contrast maps are normally confounded with contributions from chemical exchange saturation transfer, direct saturation and magnetization transfer effects. Consequently, the chemical exchange saturation transfer effect variation with B1 follows a complicated function and depends on the tissue types as well. In this work, we developed and tested a novel approach for B1 inhomogeneity correction based on acquiring calibration data at a coarsely sampled B1 values in conjunction with the measured B1 maps. With this approach, different calibration curves are derived for gray matter and white matter instead of a simple linear scaling based on local B1 values. Potential extensions of this approach to study chemical exchange saturation transfer contrast from other metabolites and tissue types are discussed.
DOI: 10.1006/jmre.1999.1956
发表时间: 2000-03-01
影响因子: 2.2
作者:
Ward, KM;Aletras, AH;Balaban, RS
通讯作者: Balaban, RS
DOI: 10.1002/cmmi.240
发表时间: 2008-07-01
影响因子: --
作者:
Stancanello, J.;Terreno, E.;Aime, S.
通讯作者: Aime, S.
DOI: 10.1002/mrm.21873
发表时间: 2009-06
影响因子: 3.3
作者:
Kim M;Gillen J;Landman BA;Zhou J;van Zijl PC
通讯作者: van Zijl PC
DOI: 10.1016/j.mri.2005.10.025
发表时间: 2006-04-01
影响因子: 2.5
作者:
Samson, RS;Wheeler-Kingshott, CAM;Tofts, PS
通讯作者: Tofts, PS
DOI: 10.1038/nm907
发表时间: 2003-08-01
期刊: NATURE MEDICINE
影响因子: 82.9
作者:
Zhou, JY;Payen, JF;van Zijl, PCM
通讯作者: van Zijl, PCM