体积导体电流成像的一种扫描流变磁声方法

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Pub Date : 1988-11-01 DOI:10.1109/IEMBS.1988.95305

B. Towe

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引用次数: 1

摘要

结果表明，当振荡磁场作用于支撑离子电流的组织时，声波会产生。这些声波是由可预测和相对较好理解的洛伦兹力产生的。在微安培的生物电流水平和1 khz和0.2 t的磁场下，力在10/sup -10/ N的数量级上，因此声学响应很弱，但在小物体上使用麦克风可以快速检测到。该原理已与磁场扫描系统结合使用，以产生2cm * 2cm * 3mm导体中离子流的图像。

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A scanning rheo-magneto-acoustic method of current imaging in volume conductors

It can be shown that acoustic waves are generated when oscillating magnetic fields are applied to tissue supporting ionic current flows. These acoustic waves result from predictable and relatively well understood Lorentz forces. At microampere biological current levels and with 1-kHz and 0.2-T magnetic fields, the forces are on the order of 10/sup -10/ N and thus the acoustic responses are weak but rapidly detectable using microphones in small objects. This principle has been used in conjunction with a magnetic field scanning system to produce images of the flow of ion currents in 2 cm*2 cm*3 mm conductors.<>

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Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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