US 12,478,439 B2
System and method for navigation
Leo Bredehoft, Longmont, CO (US); Brad Jacobsen, Erie, CO (US); and Shai Ronen, Westminster, CO (US)
Assigned to Medtronic Navigation, Inc., Louisville, CO (US)
Filed by Medtronic Navigation, Inc., Louisville, CO (US)
Filed on Dec. 22, 2023, as Appl. No. 18/394,785.
Application 18/394,785 is a continuation of application No. 16/855,573, filed on Apr. 22, 2020, granted, now 11,857,267.
Prior Publication US 2024/0138925 A1, May 2, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 34/20 (2016.01); A61B 90/00 (2016.01)
CPC A61B 34/20 (2016.02) [A61B 90/37 (2016.02); A61B 2034/2051 (2016.02); A61B 2034/2055 (2016.02); A61B 2560/0223 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A navigation system configured to navigate an instrument during a procedure, the navigation system comprising:
a controller configured to generate a spread spectrum signal comprising a binary pseudo noise signal;
a transmitter system configured to receive the signal from the controller and transmit a transmitted signal; and
a receiver configured to receive the transmitted signal from the transmitter system and configured to send a receiver signal to the controller based upon the transmitted signal received at the receiver;
wherein the controller is configured to evaluate the receiver signal to characterize and account for hardware noise in the transmitter system and receiver of the navigation system by calibrating and equalizing the receiver signal with the signal from the controller to generate an equalized signal by removing distortions of the controller and the receiver;
wherein the controller is further configured to use the equalized signal to determine a pose of a tracking device with a tracking device signal and noise from external distortion.