Method and system for determining an angle between two parts of a bone

US10165998B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Karl Barth · Hochspeyer, DE
• Alexander Gemmel · Erlangen, DE
• Gerhard Kleinszig · Forchheim, DE
• Wei Wei · Beijing, CN
• Markus Weiten · Nuremberg, DE

Key dates

• Filing date: Jan 22, 2016
• Grant date: Jan 1, 2019
• Expiry date: Nov 12, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G16H50/30
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method and a system for determining an angle between two parts of a bone that are twisted relative to one another about the axis of a bone shaft. The system is particularly suitable for determining the antetorsion angle of a femur. In order to determine an antetorsion angle of a bone easily intraoperatively, a method with the following steps is proposed: establishing the position of a first orientation feature assigned to a first part of the bone, in particular a femoral neck axis, using an imaging method, establishing the position of a second orientation feature assigned to a second part of the bone, in particular a condyle tangent or a condyle plane, using an imaging method, and determining the angle, in particular the femoral antetorsion angle, from the positions of the two orientation features.