A device for measuring an internal dimension of a native cardiac valve annulus includes an elongated support member having a proximal portion and a distal portion. Multiple image frames are captured by the camera equipped with the rolling shutter. The second antiferromagnetic layer is milled to form an indent. In each path of the MIMO system, in domain crosstalk and possibly some combination of noise, alien crosstalk, andor other interference such as RF interference, is canceled from the signal being processed.