Radio frequency system design for Medical MRI Device
Publish Time: 2024-05-16
The RF system of Medical MRI Device is one of its core components, which is responsible for generating and receiving RF signals during the imaging process. The design of the RF system is crucial to the performance of MRI equipment, directly affecting the clarity of images and the accuracy of diagnosis.
The radio frequency system mainly consists of two parts: radio frequency transmitter and radio frequency receiver. The radio frequency transmitting part transmits radio frequency pulses to the human body through the radio frequency transmitting coil to excite the hydrogen protons in the human body, causing them to rotate and resonate. The RF transmitting coil should emit RF pulses as uniformly as possible, and its frequency should be consistent with the Larmor frequency of hydrogen protons in the imaging area to ensure that the entire imaging area can be effectively excited.
The radio frequency receiving part is responsible for receiving radio frequency signals generated by human tissue. The design of the receiving coil is equally important, as it directly affects the signal-to-noise ratio of the image. In order to improve reception efficiency, RF receiving coils usually adopt a multi-channel design. Each channel receives signals independently, and the signals from multiple channels are synthesized through subsequent digital processing to obtain higher quality images.
In the design of radio frequency systems, it is also necessary to consider how to reduce the interference and noise of radio frequency signals. This includes optimizing coil layout, selecting appropriate filters, reducing system temperature, etc. In addition, with the continuous advancement of technology, new radio frequency technologies such as digital radio frequency and multi-band radio frequency have also been applied to MRI equipment, further improving imaging quality and diagnostic efficiency.
In short, the RF system of Medical MRI Device is a complex and critical component. Through reasonable design and optimized technology, it can be ensured that MRI equipment generates high-quality radio frequency signals during the imaging process, thereby providing doctors with accurate and clear diagnostic images.
