The movement of a nerve in a magnetic field: application to MRI Lorentz effect imaging.
The movement of a nerve in a magnetic field: application to MRI Lorentz effect imaging.
复制标题
神经在磁场中的运动:在 MRI 洛伦兹效应成像中的应用。
DOI:
10.1007/s11517-014-1153-y
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发表时间:
2014-05
影响因子:
3.2
通讯作者:
Puwal, Steffan
中科院分区:
文献类型:
--
作者:
Roth, Bradley J.;Luterek, Adam;Puwal, Steffan
Direct detection of neural activity with MRI would be a breakthrough innovation in brain imaging. A Lorentz force method has been proposed to image nerve activity using MRI; a force between the action currents and the static MRI magnetic field causes the nerve to move. In the presence of a magnetic field gradient, this will cause the spins to precess at a different frequency, affecting the MRI signal. Previous mathematical modeling suggests that this effect is too small to explain the experimental data, but that model was limited because the action currents were assumed to be independent of position along the nerve, and because the magnetic field was assumed to be perpendicular to the nerve. In this paper, we calculate the nerve displacement analytically without these two assumptions. Using realistic parameter values, the nerve motion is less than 5 nm, which induced a phase shift in the MRI signal of less than 0.02°. Therefore, our results suggest that Lorentz force imaging is beyond the capabilities of current technology.
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影响因子:
2.9
作者:
Poplawsky, Alexander J.;Dingledine, Raymond;Hu, Xiaoping P.
通讯作者:
Hu, Xiaoping P.
DOI:
10.1016/j.pbiomolbio.2004.08.007
发表时间:
2005-02-01
影响因子:
3.8
作者:
Feychting, M
通讯作者:
Feychting, M
DOI:
10.1258/ebm.2010.010236
发表时间:
2011-02
期刊:
Experimental biology and medicine (Maywood, N.J.)
影响因子:
--
作者:
Roth BJ
通讯作者:
Roth BJ
影响因子:
3.3
作者:
Roth, Bradley J.;Basser, Peter J.
通讯作者:
Basser, Peter J.
DOI:
10.1073/pnas.0605486103
发表时间:
2006-08-15
影响因子:
11.1
作者:
Truong, Trong-Kha;Song, Allen W.
通讯作者:
Song, Allen W.