MAGNETOHYDRODYNAMICS OF BLOOD-FLOW

被引:95
作者
KELTNER, JR
ROOS, MS
BRAKEMAN, PR
BUDINGER, TF
机构
[1] Donner Laboratory, Research Medicine and Radiation Biophysics Division, Lawrence Berkeley Laboratory, Berkeley, California, 94720, l Cyclotron Road
关键词
D O I
10.1002/mrm.1910160113
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
The changes in hydrostatic pressure and electrical potentials across vessels in the human vasculature in the presence of a large static magnetic field are estimated to determine the feasibility of in vivo NMR spectroscopy at fields as high as 10 T. A 10‐T magnetic field changes the vascular pressure in a model of the human vasculature by less than 0.2%. An exact solution to the magnetohydrodynamic equations describing a conducting fluid flowing transverse to a static magnetic field in a nonconducting, straight, circular tube is used. This solution is compared to an approximate solution that assumes that no magnetic fields are induced in the fluid and that has led previous investigators to predict significant biological effects from static magnetic fields. Experimental results show that the exact solution accurately predicts the magnetohydrodynamic slowing of 15% NaCl flowing transverse to 2.3‐ and 4.7‐T magnetic fields for fluxes below 0.5 liter/min while the approximate solution predicts a much more retarded flow. © 1990 Academic Press, Inc. Copyright © 1990 Wiley‐Liss, Inc., A Wiley Company
引用
收藏
页码:139 / 149
页数:11
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