Method for marker-free automatic fusion of 2-D fluoroscopic C-arm images with preoperative 3D images using an intraoperatively obtained 3D data record

US7010080B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Matthias Mitschke · Nuremberg, DE
• Norbert Rahn · Forchheim, DE
• Dieter Ritter · Bad Mergentheim, DE

Key dates

• Filing date: May 20, 2004
• Grant date: Mar 7, 2006
• Expiry date: Jul 29, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S378/901
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In a method and apparatus for automatic marker-free fusion (matching) of 2D fluoroscopic C-arm images with preoperative 3D images using an intraoperatively acquired 3D data record, an intraoperative 3D image is obtained using a C-arm x-ray system, image-based matching of an existing preoperative 3D image in relation to the intraoperative 3D image is undertaken, which generates a matching matrix of a tool plate attached to the C-arm system is matched in relation to a navigation system, a 2D fluoroscopic image to be matched is obtained, with the C-arm of the C-arm system in any arbitrary location, a projection matrix for matching the 2D fluoroscopic image in relation to the 3D image is obtained, and the 2D fluoroscopic image is fused (matched) with the preoperative 3D image on the basis of the matching matrix and the projection matrix.