Electric Current Detection Based on the MR Signal Magnitude Decay.

ABSTRACT:

Purpose

Conventional current density imaging method, which relies on the detection of the magnetic field induced by the current in an image phase, is demanding and difficult to perform. In this study, a much simpler signal-magnitude-decay (SMD)-based current detection method is proposed.

Methods

Conductive test and biological samples were imaged at various TE times using the gradient- or spin-echo imaging sequences with superimposed constant or bipolar currents, respectively. The SMD curve was sampled for each image voxel, which enabled voxel-vise current density calculation by fitting an appropriate SMD model curve to the measured SMD curve. Effect of the voxel size on the signal decay and precision of the current density calculation was studied as well.

Results

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SUBMITTER: Sersa I 

PROVIDER: S-EPMC9325414 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature