The high signal-to-noise ratio coil uses a high-density phased-array structure layout with unique RF optimization for knee tissue to ensure excellent signal-to-noise ratio while eliminating all kinds of artifacts. The dedicated targeting coil with improved efficiency and support for various acceleration functions reduces scanning time and provides fast and high quality imaging of the knee. The humanized and ingenious mechanical structure design allows the left and right knee to be switched at will, making it easy for doctors to use and comfortable for patients.