Research on Communication Transmission of Ultra-Low Field MRI Digital Receiver Based on PXIe Architecture

This article focuses on responding to today's ever- increasing demands for convenient and economical medical solutions, with special attention to the innovation of MRI systems with ultra-low magnetic field strengths of 0.1 Tesla and below. With its obvious advantages of being lightweight, compact and cost-effective, this type of MRI system is becoming an ideal way to expand the coverage of medical services to primary medical institutions and even remote areas. The article details a high-performance digital receiver specially designed to meet the technical challenges of ultra-low-field MRI. The receiver integrates the cutting-edge PXIe technology architecture and is based on National Instruments (NI). Hardware modules are core components. The research work not only includes systematic theoretical conception and specific implementation, but also includes a comprehensive practical verification process under laboratory conditions. Especially in a 50-milliTesla-level ultra-low-field MRI experimental setup, the researchers conducted in-depth system integration and functional performance testing of the digital receiver, and fine- tuned the receiving coil (RX Coil). Experimental evidence shows that this digital receiver developed based on the PXIe architecture exhibits excellent signal capture and processing performance in ultra-low field MRI environments. Thanks to this, combined with Nl's data acquisition (DAQ) hardware equipment and LabVIEW visual programming with this tool, the R&D team can efficiently complete the system construction and quickly put it into practical application within a short R&D period, thus effectively promoting the in-depth development and widespread application of ultra-low field MRI technology at the practical level.