1. A method of processing data relating to detected magnetic resonance of a contrast agent obtained by magnetic resonance monitoring of an object being a human or animal body, the method comprising: monitoring magnetic resonance to detect magnetic resonance signals of contrast agent in the object, the magnetic resonance signals having signal intensities that are sensitive to movement of the contrast agent with respect to the object, determining from the detected magnetic resonance signals contrast agent which is moving relative to the object, wherein the method comprises discriminating from the contrast agent which is moving relative to the object, a part of the contrast agent which is bound to the object.