US 12,251,174 B2
Systems and methods for magnetic interference correction
Ron Barak, Tel Aviv (IL); and Ariel Birenbaum, Raanana (IL)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Apr. 1, 2024, as Appl. No. 18/623,547.
Application 18/623,547 is a continuation of application No. 16/582,587, filed on Sep. 25, 2019, granted, now 11,944,388.
Claims priority of provisional application 62/794,209, filed on Jan. 18, 2019.
Claims priority of provisional application 62/794,435, filed on Jan. 18, 2019.
Claims priority of provisional application 62/738,148, filed on Sep. 28, 2018.
Prior Publication US 2024/0245470 A1, Jul. 25, 2024
Int. Cl. A61B 34/20 (2016.01); A61B 5/00 (2006.01); A61B 5/06 (2006.01); A61B 6/00 (2024.01); A61B 90/00 (2016.01); G01B 7/004 (2006.01); G01R 31/00 (2006.01); H01Q 1/22 (2006.01)
CPC A61B 34/20 (2016.02) [A61B 5/062 (2013.01); A61B 5/065 (2013.01); A61B 5/7217 (2013.01); A61B 6/487 (2013.01); G01B 7/004 (2013.01); G01R 31/001 (2013.01); H01Q 1/22 (2013.01); A61B 2034/2051 (2016.02); A61B 2034/2072 (2016.02); A61B 2090/376 (2016.02)] 20 Claims
OG exemplary drawing
 
20. A system comprising:
antennae configured to generate electromagnetic fields at different frequencies;
at least one sensor configured to measure electromagnetic fields;
a processor; and
a memory having stored thereon instructions, which, when executed by the processor, cause the processor to:
calculate simulated ultra-high definition (UHD) map based on configuration of antennae;
receive measured electromagnetic fields;
record the measured electromagnetic fields in a low-resolution grid;
generate an interface map by determining a difference between the measured electromagnetic fields in the low-resolution grid and corresponding positions in the calculated UHD map;
generate a UHD interface map through interpolation of the interference map into a high-resolution grid;
generate a modified UHD map by combining the UHD interference map with the calculated UHD map; and
determine, based on the modified UHD map, position and orientation information of the at least one sensor.