Department of Information & Communication Engineering, Dongguk University, Seoul, South Korea.
Int J Neurosci. 2009;119(9):1337-45. doi: 10.1080/00207450902938503.
The purpose of the current study is to develop a magnetic resonance (MR)-compatible galvanic skin response (GSR) measurement system that can measure the GSR signal during MR image acquisition. If GSR signals are measured simultaneously with the acquisition of MR images, there can be a mutual interference effect. The present system was designed to block noises caused by the main magnetic field, the gradient magnetic field, and the radio frequency (RF) pulse when MR images are acquired. To minimize the distortion of MR images, the GSR measurement system was shielded. Especially, this system used analog, not digital, elements in order to remove any possible effects on MR images. An RF-interference-free optical data link using the pulse-width modulation technique was adopted in order to transmit GSR signals measured inside the MR room. The experiment verified that a reliable GSR signal can be obtained without deteriorating the MR image. It is expected that this system can be used for diverse medical and neuroscience studies.
本研究旨在开发一种磁共振（MR）兼容的皮肤电反应（GSR）测量系统，该系统可在 MR 图像采集过程中测量 GSR 信号。如果在获取 MR 图像的同时测量 GSR 信号，则可能会产生相互干扰的效果。本系统旨在屏蔽在获取 MR 图像时由主磁场、梯度磁场和射频（RF）脉冲引起的噪声。为了最小化 MR 图像的失真，对 GSR 测量系统进行了屏蔽。特别是，该系统使用模拟元件而不是数字元件，以去除对 MR 图像的任何可能影响。采用采用脉冲宽度调制技术的无 RF 干扰的光学数据链路来传输在 MR 室内测量的 GSR 信号。实验验证了可以在不降低 MR 图像质量的情况下获得可靠的 GSR 信号。预计该系统可用于各种医学和神经科学研究。
