发明名称 |
METHOD AND APPARATUS FOR DETERMINING A LEG LENGTH DIFFERENCE AND A LEG OFFSET |
摘要 |
A data processing method, performed by a computer, for determining a leg length difference and a leg offset difference of a patient's leg including a femur connected to a pelvis, comprising the steps of: —determining a first landmark vector between a femoral landmark and a second landmark at a first point in time; —determining a second landmark vector between the femoral landmark and the second landmark at a second point in time which is later than the first point in time; —calculating an orthogonal projection of the first landmark vector into a sagittal plane and using the direction of the orthogonal projection of the first landmark vector into the sagittal plane as a leg length direction; —calculating a direction which is perpendicular to the sagittal plane and using this direction as a leg offset direction; and —calculating the leg length difference in the leg length direction and the leg offset difference in the leg offset direction from the first landmark vector and the second landmark vector. |
申请公布号 |
US2016022173(A1) |
申请公布日期 |
2016.01.28 |
申请号 |
US201314773553 |
申请日期 |
2013.09.18 |
申请人 |
BRAINLAB AG |
发明人 |
SCHUBERT Mario;WEGNER Melanie;KLING Sabine;POITZSCH Luise |
分类号 |
A61B5/107;A61B5/11;A61B5/00 |
主分类号 |
A61B5/107 |
代理机构 |
|
代理人 |
|
主权项 |
1. A data processing method, performed by a computer, for determining a leg length difference and a leg offset difference of a patient's leg including a femur connected to a pelvis, comprising the steps of:
determining a first landmark vector between a femoral landmark and a second landmark at a first point in time; determining a second landmark vector between the femoral landmark and the second landmark at a second point in time which is later than the first point in time; calculating an orthogonal projection of the first landmark vector into a sagittal plane and using the direction of the orthogonal projection of the first landmark vector into the sagittal plane as a leg length direction; calculating a direction which is perpendicular to the sagittal plane and using this direction as a leg offset direction; and calculating the leg length difference in the leg length direction and the leg offset difference in the leg offset direction from the first landmark vector and the second landmark vector. |
地址 |
Feldkirchen DE |