Research On High Speed Optical Fiber Transmission Technology For Magnetic Resonance Imaging Receiver

To obtain clear images at a fast rate is the objective of magnetic resonance imaging technology. In recent years, the development of multi-channel receiving coil technology and parallel magnetic resonance imaging have become the main method of improving the speed of MRI. The new techniques require the MRI receiving system to provide more reliable and efficient data transmission.Due to the influence of strong magnetic field environment, MRI receiver, in the equipment room, should be placed far away from the receiving coils. So in the traditional coaxial cable transmission scheme, analog signals from multi-channel receiving coils need to go through a relatively long distance before processed. On the one hand, the analog signal will inevitably cause distortion, which is lost in the process of transmission and treatment. On the other hand, the coaxial cable has limited bandwidth and weak electromagnetic shielding relatively, which will be more serious when the number of channels is on the increase. Although there are some methods which are better according to the traditional MRI data transmission, they still have insoluble defects and technical difficulties. The problems in multi-channel magnetic resonance transmission can’t be solved fundamentally either.In this paper, on the premise of deep research and analysis of various MR transmission methods, we have designed and implemented a high speed digital optical fiber transmission scheme based on FPGA. The scheme uses optical fiber as transmission medium, and the MR data is transmitted and processed in the form of digital signal to the equipment room. It can effectively solve the problems which emerge in the traditional coaxial cable analog data transmission scheme. The scheme provides a flexible, stable method to convey the MRI data. This scheme has a great prospect of application and a worthwhile value to research.