US 11,771,339 B2
Heterodyne catheter calibration system
Aleksander Prylutskyy, Migdal Ha'emek (IL); Vadim Gliner, Haifa (IL); George Gusein, Akko (IL); and Ilan Goldenberg, Netanya (IL)
Assigned to BIOSENSE WEBSTER (ISRAEL) LTD., Yokneam (IL)
Filed by Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed on Jun. 29, 2021, as Appl. No. 17/362,725.
Prior Publication US 2022/0409087 A1, Dec. 29, 2022
Int. Cl. A61B 5/00 (2006.01); A61B 5/06 (2006.01); A61B 5/1495 (2006.01); A61B 5/145 (2006.01)
CPC A61B 5/062 (2013.01) [A61B 5/1495 (2013.01); A61B 5/6852 (2013.01); A61B 5/065 (2013.01); A61B 5/14503 (2013.01); A61B 2560/0223 (2013.01); A61B 2562/0223 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A catheter calibration system, comprising:
a calibration chamber, configured to generate a calibration magnetic field that oscillates at a first frequency, the calibration chamber comprising a cavity for inserting a distal end of a catheter having one or more magnetic-field sensors;
a receiver, which is configured to be connected to the catheter that is inserted in the cavity of the calibration chamber, to receive from the catheter one or more signals, which are generated by the one or more magnetic-field sensors in response to the calibration magnetic field, and to convert the one or more signals into one or more respective intermediate frequency (IF) signals having a second frequency that is lower than the first frequency, and wherein the receiver is further configured to convert the one or more signals into the one or more IF signals by multiplying the one or more signals by a Local Oscillator (LO) signal; and
a processor, which is configured to receive the one or more IF signals from the receiver and to calculate catheter navigation calibration data from the one or more IF signals.