MAGNETIC PICKUP CANCELLATION BY COMPENSATION LEADS
FIG1 is a schematic, pictorial illustration of a catheter-based magnetic position-tracking and ablation system, in accordance with an embodiment of the present invention
FIG1 is a schematic, pictorial illustration of a catheter-based magnetic position-tracking and ablation system 20, in accordance with an embodiment of the present invention. System 20 comprises a catheter 21, having a shaft distal end 22 that is navigated by a physician 30 into a heart 26 of a patient 28 via the vascular system. In the pictured example, physician 30 inserts shaft distal end 22 through a sheath 23, while manipulating the distal end of shaft distal end 22 using a manipulator 32 near the proximal end of the catheter. As shown in an inset 25, shaft distal end 22 comprises a magnetic sensor 51 contained within the shaft distal end 22 and an ablation catheter 50.
schematic
28
patient
51
sensor
30
physician
39
processor
38
interface circuits
22
distal end
29
patient table
20
system
25
inset
34
driver circuit
27
display
50
ablation catheter
26
heart
21
catheter
36
generators
23
sheath
32
manipulator
['1. A wiring assembly, comprising: a differential input port, configured to receive a differential signal from a sensor at a first end of the wiring assembly; a differential output port, configured to output the differential signal at a second end of the wiring assembly; and first and second pairs of electrical leads, which convey the differential signal from the first end to the second end, and which are connected to one another at the first end and at the second end in a configuration that cancels pickup of an ambient magnetic field by the wiring assembly.']