An intravascular system comprising: a catheter (102; 202; 502; 802; 902a-c; 1102; 1202; 1302) including a proximal end, a distal end, a plurality of magnetic domains (1170; 1270; 1370), the plurality of magnetic domains including a variety of magnetization directions and/or magnitudes used to differentiate the domains such that magnetic domains in a subset of the plurality of magnetic domains (1170; 1270; 1370) are distinguishable from magnetic domains in a different subset of the plurality of magnetic domains (1170; 1270; 1370), a sensor (108; 208; 508; 808; 1308) located at the distal end, and a cable (268; 1268) extending from the proximal end of the catheter to the distal end of the catheter and operatively connected to the sensor at the distal end, the sensor (1170; 1270; 1370) configured to provide sensor information representative of one or more intravascular properties of a patient, wherein the plurality of magnetic domains are consecutively arranged in a plurality of groups of magnetic domains, each group of magnetic domains having, consecutively arranged, one magnetic domain with a first magnetization magnitude, one magnetic domain with a second magnetization magnitude greater than the first magnetization magnitude, and one magnetic domain with a third magnetization magnitude greater than each of the first magnetization magnitude and the second magnetization magnitude; a magnetic pickup (1050; 1150; 1250; 1350) configured to output a pickup signal based on the magnetic field at the magnetic pickup produced by the plurality of magnetic domains (1170; 1270; 1370); and an intravascular processing engine (112; 812; 1012) in communication with the sensor (108; 208; 508; 808; 1308) of the catheter and the magnetic pickup (1050; 1150; 1250; 1350) and configured to: (i) receive the sensor information from the sensor (108; 208; 508; 808; 1308) of the catheter; (ii) receive a position signal representative of the pickup signal; (iii) determine position information related to the position of the catheter sensor (108; 208; 508; 808; 1308) based on the received position signal; and (iv) combine the received sensor information and corresponding determined position information. a catheter (102; 202; 502; 802; 902a-c; 1102; 1202; 1302) including a proximal end, a distal end, a plurality of magnetic domains (1170; 1270; 1370), the plurality of magnetic domains including a variety of magnetization directions and/or magnitudes used to differentiate the domains such that magnetic domains in a subset of the plurality of magnetic domains (1170; 1270; 1370) are distinguishable from magnetic domains in a different subset of the plurality of magnetic domains (1170; 1270; 1370), a sensor (108; 208; 508; 808; 1308) located at the distal end, and a cable (268; 1268) extending from the proximal end of the catheter to the distal end of the catheter and operatively connected to the sensor at the distal end, the sensor (1170; 1270; 1370) configured to provide sensor information representative of one or more intravascular properties of a patient, wherein the plurality of magnetic domains are consecutively arranged in a plurality of groups of magnetic domains, each group of magnetic domains having, consecutively arranged, one magnetic domain with a first magnetization magnitude, one magnetic domain with a second magnetization magnitude greater than the first magnetization magnitude, and one magnetic domain with a third magnetization magnitude greater than each of the first magnetization magnitude and the second magnetization magnitude; a magnetic pickup (1050; 1150; 1250; 1350) configured to output a pickup signal based on the magnetic field at the magnetic pickup produced by the plurality of magnetic domains (1170; 1270; 1370); and an intravascular processing engine (112; 812; 1012) in communication with the sensor (108; 208; 508; 808; 1308) of the catheter and the magnetic pickup (1050; 1150; 1250; 1350) and configured to: (i) receive the sensor information from the sensor (108; 208; 508; 808; 1308) of the catheter; (ii) receive a position signal representative of the pickup signal; (iii) determine position information related to the position of the catheter sensor (108; 208; 508; 808; 1308) based on the received position signal; and (iv) combine the received sensor information and corresponding determined position information. (i) receive the sensor information from the sensor (108; 208; 508; 808; 1308) of the catheter; (ii) receive a position signal representative of the pickup signal; (iii) determine position information related to the position of the catheter sensor (108; 208; 508; 808; 1308) based on the received position signal; and (iv) combine the received sensor information and corresponding determined position information.