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1. (WO2018058247) COMPUTER-ASSISTED SURGERY SYSTEM AND METHOD FOR CALCULATING A DISTANCE WITH INERTIAL SENSORS

Pub. No.:    WO/2018/058247    International Application No.:    PCT/CA2017/051154
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Sat Sep 30 01:59:59 CEST 2017
IPC: A61B 34/20
A61B 5/103
A61B 5/107
G01C 22/02
Applicants: ORTHOSOFT INC.
Inventors: FALARDEAU, Bruno
PROULX, Catherine
JANSEN, Herbert Andre
PELLETIER, Benoit
TARDIF, Jonathan
Title: COMPUTER-ASSISTED SURGERY SYSTEM AND METHOD FOR CALCULATING A DISTANCE WITH INERTIAL SENSORS
Abstract:
A computer-assisted surgery system for obtaining a distance between at least two fixed points relative to a bone comprises a first accelerometer unit located at a first fixed location on the bone, and producing first acceleration data during a movement of the bone. A second accelerometer unit is located at a second fixed location on the bone, and simultaneously producing second acceleration data during the movement. A gyroscope unit is fixed to the bone and simultaneously producing angular rates of change of said movement. A processor unit obtains the acceleration data and the angular rates of change for calculating the distance between the first fixed position and the second fixed position on the bone using a distance value of a distance vector between the accelerometer units. An interface outputs the distance between the first fixed position and the second fixed position relative to the bone. A method for calculating a distance between at least two points on a bone is provided.