Magnetic Resonance Signal Correction via RF Channel Mapping

The patent applies preliminary action by pre-characterizing the radio frequency receiving channel using test signals before actual MRI scanning. A signal mapping relationship is established in advance by sending test signals through the channel and recording the mapping between input and output signals. This pre-characterization allows the system to compensate for non-linearities during actual operation without requiring physical modification of the amplifiers or channel components.

The patent introduces an intermediary approach by using a signal mapping relationship as a mediator between the distorted received signals and the original undistorted signals. Instead of trying to correct the physical non-linearities in the amplifiers, the system creates a computational mapping that translates distorted signal values back to their correct values, effectively mediating the distortion without addressing the underlying hardware issue.

The patent implements feedback by using the recorded signal mapping relationship to correct the distorted signals during MRI scanning. The system continuously references the pre-characterized mapping between test signal input and output values, and uses this feedback information to adjust and correct the magnetic resonance signals as they pass through the same non-linear channel, thereby compensating for distortion in real-time.

The patent applies copying by creating a virtual copy of the signal mapping relationship that can be stored and reused. Instead of physically modifying the channel, the system creates a computational replica of the channel's behavior through the signal mapping relationship, which can then be applied to correct signals without altering the actual physical channel or requiring repeated calibration.