Image contributions produced by an untagged specimen magnetization component in magnetic resonance imaging are controlled by applying one or more radiofrequency pulses that invert at least a portion of the untagged specimen magnetization. The non-volatile magnetic memory cell comprises a switchable magnetic element; and a word line and a bit line to energize the switchable magnetic element; wherein at least one of the word line and the bit line comprises a magnetic sidewall that is discontinuous. Also disclosed is an ink jet recording medium having no ink receiving layer, which comprises a substrate treated with a solution of a metal salt and in which the front and back sides of the substrate each have a Bekk’s surface smoothness of 200 seconds or higher. The plurality of packets may also include audiovisual information.