Wei Juan, Liu Zhengguang, Chai Zhi, Yuan Jing, Lian Jianyu, Shen Gary X
Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
J Magn Reson. 2007 Jun;186(2):358-63. doi: 10.1016/j.jmr.2007.03.003. Epub 2007 Mar 12.
In this paper, a digital wireless transmission system based on 802.11b standard for magnetic resonance imaging (MRI) application is designed and built for the first time to eliminate the interference aroused by coil array cables. The analysis shows that the wireless receiver has a very high sensitivity to detect MRI signals. The modulation technique of differential quadrature phase shift keyed (DQPSK) can be applied to MRI data transmission with rate of 2 Mbps and bandwidth of 2 MHz. The bench test verifies that this wireless link has a dynamic range over 86 dB supporting up to 3 T MRI system data transmission. The 2D spin echo imaging of phantom is performed and the SNR of the image obtained by the wireless transmission can be comparable with that got by the coaxial cables.
本文首次设计并构建了一种基于802.11b标准的用于磁共振成像（MRI）应用的数字无线传输系统，以消除线圈阵列电缆引起的干扰。分析表明，无线接收器对检测MRI信号具有非常高的灵敏度。差分正交相移键控（DQPSK）调制技术可应用于速率为2 Mbps、带宽为2 MHz的MRI数据传输。台架测试验证了该无线链路具有超过86 dB的动态范围，支持高达3 T的MRI系统数据传输。对体模进行了二维自旋回波成像，通过无线传输获得的图像的信噪比与通过同轴电缆获得的图像相当。
