Measurement of nonuniform current density by magnetic resonance

Scott G.C.; Joy M.L.G.

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Measurement of nonuniform current density by magnetic resonance

机译：通过磁共振测量不均匀电流密度

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摘要

A noninvasive tissue current measurement technique and its use in measuring a nonuniform current density are described. This current density image is created by measuring the magnetic field arising from these currents and taking its curl. These magnetic fields are proportional to the phase component of a complex magnetic resonance image. Measurements of all three components of a quasistatic nonuniform current density in a phantom are described. Expected current density calculations from a numerical solution for the magnetic field which was created by the phantom are presented for comparison. The results of a numerical simulation of the experiment, which used this field solution and which included the effects of slice selection and sampling, are also presented. The experimental and simulated results are quantitatively compared. It is concluded that the principle source of systematic error was the finite slice thickness, which causes blurring of boundaries.

机译：描述了一种非侵入性组织电流测量技术及其在测量非均匀电流密度中的用途。该电流密度图像是通过测量由这些电流产生的磁场并使其弯曲来创建的。这些磁场与复杂的磁共振图像的相位分量成比例。描述了幻影中准静态不均匀电流密度的所有三个分量的测量。提出了由幻影创建的磁场数值解的预期电流密度计算，以进行比较。还给出了使用该现场解决方案并包括切片选择和采样效果的实验数值模拟结果。实验结果和模拟结果进行了定量比较。结论是系统误差的主要来源是有限的切片厚度，这会导致边界模糊。

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《IEEE Transactions on Medical Imaging》 |1991年第3期|P.362-374|共13页
作者
Scott G.C.; Joy M.L.G.;
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正文语种 eng
中图分类无线电电子学、电信技术;
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机译：使用低噪声电流源的磁共振电阻抗层析成像中的磁通密度测量
2. Measurement of electrical current density distribution in a simple head phantom with magnetic resonance imaging. [J] . Gamba HR, Bayford R, Holder D Physics in medicine and biology. . 1999,第1期

机译：用磁共振成像测量简单的头部模型中的电流密度分布。
3. Measurement of electrical current density distribution within the tissues of the head by magnetic resonance imaging. [J] . Gamba HR, Delpy DT Medical and Biological Engineering and Computing: Journal of the International Federation for Medical and Biological Engineering . 1998,第2期

机译：通过磁共振成像测量头部组织内的电流密度分布。
4. Measurement of electric current density with magnetic resonance imaging [C] . Eyuboglu, B.M., Reddy, . 1996

机译：用磁共振成像测量电流密度
5. Raman optical activity: Theory, instrumentation and measurements. Electron transition current density: Ab initio calculation of vibrational transition current density in selected molecules. [D] . Lee, Eunah. 2000

机译：拉曼光学活性：理论，仪器和测量。电子跃迁电流密度：所选分子中振动跃迁电流密度的从头算。
6. Measurement of nonuniform current densities and current kinetics in Aplysia neurons using a large patch method. [O] . J W Johnson, S Thompson 1989

机译：使用大贴片法测量海床神经元中非均匀电流密度和电流动力学。
7. Measurement of nonuniform current densities and current kinetics in Aplysia neurons using a large patch method. [O] . Johnson, J W, Thompson, S 1989

机译：使用大贴片法测量海床神经元中非均匀电流密度和电流动力学。
8. Flux creep: Its dependence on current denisty and relation to critical current densities from transport and magnetic measurements [R] . Maley, M P, Kung, P J, Cho, J H, 1994

机译：磁通蠕变：它依赖于电流密度和与运输和磁测量的临界电流密度的关系

Measurement of nonuniform current density by magnetic resonance

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