Magnetic resonance imaging of convection in an electrolyte solution and extracellular fluid associated with stationary electric currents
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説明
<jats:p>Convection in an electrolyte solution associated with stationary electric currents has been investigated as one of the Rayleigh–Bénard type instability problems in fluid mechanics. However, details of convective flow associated with current have not yet been clarified because visualization of three-dimensional flow is difficult. In the present study, convections in a 0.9% NaCl solution and extracellular fluid were visualized using magnetic resonance imaging. Flow velocities were measured from the increase of the signal intensity based on in-flow effects of unsaturated spins. The maximum velocity with a stationary current of 1.0 mA/cm2 was 0.85 cm/s in the NaCl solution. The onset of the convection was within a few seconds after turning the current on, which depended on the distance from the electrode. The convection was observed with a current frequency lower than 2.0 Hz. In the muscle tissue of a rat, convection in extracellular fluid was observed with an injection of a 10 mA stationary current from a pair of surface electrodes.</jats:p>
収録刊行物
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- Journal of Applied Physics
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Journal of Applied Physics 94 5359-5366, 2003-10-15
AIP Publishing
