周围神经动作电流对磁共振成像的影响。
Effect of peripheral nerve action currents on magnetic resonance imaging.
作者信息
Wijesinghe Ranjith, Roth Bradley J
机构信息
Department of Physics and Astronomy, Ball State University, Muncie, Indiana, USA.
出版信息
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:2696-8. doi: 10.1109/IEMBS.2009.5332921.
Many researchers have attempted to detect neural currents directly using magnetic resonance imaging (MRI). The action currents of a peripheral nerve create their own magnetic field that can cause the phase of the spins to change. Our goal in this paper is to use the measured magnetic field of a nerve to estimate the resulting phase shift in the magnetic resonance signal. We examine three cases: the squid giant axon, the frog sciatic nerve, and the human median nerve. In each case, the phase shift is much less than one degree, and will be very difficult to measure with current technology.
许多研究人员试图直接利用磁共振成像（MRI）检测神经电流。外周神经的动作电流会产生自身的磁场，该磁场会导致自旋相位发生变化。本文的目标是利用测得的神经磁场来估计磁共振信号中产生的相位偏移。我们研究了三种情况：鱿鱼巨轴突、青蛙坐骨神经和人类正中神经。在每种情况下，相位偏移都远小于1度，并且用当前技术很难测量。
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