US 12,465,438 B2
Augmented reality assisted navigation of knee replacement
Matthew William Ryan, Aliso Viejo, CA (US); and Jonathan Kirk Nielsen, Cedar Park, TX (US)
Assigned to Insight Medical Systems, Inc., Austin, TX (US)
Filed by INSIGHT MEDICAL SYSTEMS, INC., Austin, TX (US)
Filed on Feb. 14, 2022, as Appl. No. 17/670,877.
Application 17/670,877 is a continuation of application No. PCT/US2021/017222, filed on Feb. 9, 2021.
Application PCT/US2021/017222 is a continuation of application No. 16/786,938, filed on Feb. 10, 2020, granted, now 11,071,596.
Application 16/786,938 is a continuation in part of application No. PCT/US2018/018330, filed on Feb. 15, 2018.
Application PCT/US2018/018330 is a continuation in part of application No. 15/674,749, filed on Aug. 11, 2017, abandoned.
Application PCT/US2018/018330 is a continuation in part of application No. PCT/US2017/046438, filed on Aug. 11, 2017.
Claims priority of provisional application 62/375,483, filed on Aug. 16, 2016.
Prior Publication US 2022/0168051 A1, Jun. 2, 2022
Int. Cl. A61B 34/00 (2016.01); A61B 17/00 (2006.01); A61B 90/00 (2016.01); G02B 27/00 (2006.01); G02B 27/01 (2006.01); G06T 7/73 (2017.01); G06T 19/00 (2011.01)
CPC A61B 34/25 (2016.02) [A61B 90/361 (2016.02); G02B 27/0093 (2013.01); G02B 27/0172 (2013.01); G06T 7/74 (2017.01); G06T 19/006 (2013.01); A61B 2017/00216 (2013.01); A61B 2090/363 (2016.02); A61B 2090/365 (2016.02); G02B 2027/0187 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for navigating a knee replacement procedure utilizing a head-worn surgical navigation system, the method comprising:
providing, during the procedure, the head-worn surgical navigation system having a sensor suite comprising at least one of a head worn depth sensor and a head worn stereoscopic camera, a display device, and at least one processor, the head-worn surgical navigation system being configured to perform instructions with the at least one processor, the instructions comprising:
performing, using the at least one of a head worn depth sensor and a head worn stereoscopic camera, a plurality of scans of a region defined for the procedure;
generating, based on at least a portion of the plurality of scans, a 3D reference topographical surface map associated with a distal surface of a femur in the region defined for the procedure;
generating, based on at least one of the plurality of scans, at least one 3D displaced topographical surface map for the distal surface of the femur in the region defined for the procedure;
aligning the at least one 3D displaced topographical surface map with the 3D reference topographical surface map to determine a geometric rotation and translation between the at least one 3D displaced topographical surface map and the 3D reference topographical surface map;
tracking a pose of the femur based on the determined geometric rotation and translation;
generating virtual content based on the tracked pose; and
causing, on the display device, display of the generated virtual content.