Design of RF front-end circuit module for human 14T MRI system

Motivation: The ultra-high field magnetic resonance imaging system can obtain ultra-high sensitivity and signal-to-noise ratio magnetic resonance imaging information, has become an important tool for basic research in brain science . Goal(s): However, with the increase of field strength and operating frequency, the RF signal processing module, faces problems such as clutter interference, mirror frequency interference, which seriously affects the performance of the RF system and the final image quality. Approach: We have solved these problems using methods such as secondary mixing. Results: After key parameter testing and verification, it meets the application requirements of the human 14T ultra-high field magnetic resonance imaging system. Impact: Our work has provided conditions for the construction of multi-channel RF modules in ultra-high fields, improving the quality of RF signal processing. Provided a hardware foundation for improving the quality of MRI images in ultra-high fields.