Method and apparatus for detecting undesirable rotation of medical markers

US10429182B2 · kind B2 · utility

Assignee

• Brainlab AG · DE

Inventors

• Jörg Uhde · Munich, DE
• Robert Essenreiter · Munich, DE

Key dates

• Filing date: Jun 19, 2012
• Grant date: Oct 1, 2019
• Expiry date: Mar 30, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F17/40
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Provided is a data processing method for determining rotation by a marker device of a medical tracking system about its mount. The data processing method includes acquiring a first marker device position dataset which represents a position of the marker device before a movement of the marker device. A second marker device position dataset is acquired which represents the position of the marker device after a movement of the marker device. A marker device displacement dataset is calculated, which represents the displacement of the marker device, from the first and second marker device position datasets. At least one axis of rotation of the marker device displacement dataset is calculated. A determination is made whether or not the marker device is rotated about its mount from the position of the at least one axis of rotation relative to the marker device.