Parts of the body, which extend beyond the Field of view in the phase encoding direction may still be visible in the image as artifacts. Please note that aliasing in the frequency direction is also possible but can be eliminated in the same manner or by applying frequency specific filters to the received signal.
Radio frequency quadrature artifacts occur when the detector channels of the quadrature detector are disturbed.
A DC offset of one amplifier output can e.g., produce a bright point in the center of the field of view (see also central point artifact), or a higher gain of one detector channel can generate diagonally ghosting.
Image Guidance
Radio frequency quadrature artifacts are technical faults and must be eliminated by the service.