Registration method and apparatus for navigation-guided medical interventions, without the use of patient-associated markers

US6932506B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Matthias Mitschke · Nuremberg, DE
• Dieter Ritter · Bad Mergentheim, DE

Key dates

• Filing date: Mar 7, 2003
• Grant date: Aug 23, 2005
• Expiry date: Mar 8, 2023

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2090/376
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A registration method and an apparatus for navigation-guided interventions employing an X-ray device and a position acquisition system and avoid the use of patient-associated markers. By means of a defined arrangement of a carrying arm proceeding from a support mount at the X-ray device and a defined arrangement of an X-ray calibration phantom at the carrying arm, the coordinate transformation between a coordinate system allocated to the support mount and a coordinate system allocated to the X-ray calibration phantom is known. On the basis of the acquisition and evaluation of 2D projections of the X-ray calibration phantom with the X-ray device, a coordinate transformation between the coordinate system allocated to the support mount and a coordinate system allocated to a measurement volume of the X-ray device is produced. By arranging a device detectable by the position acquisition system at the support mount, a coordinate transformation between the coordinate system allocated to the measurement volume and a coordinate system allocated to the calibration phantom is determined for the navigation.