C-arm system with extended field of view

US9439605B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Dirk Schäfer · Hamburg, DE
• Michael Grass · Hanstedt, DE

Key dates

• Filing date: Nov 9, 2012
• Grant date: Sep 13, 2016
• Expiry date: Feb 11, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/588
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The present invention relates to a C-arm X-ray imaging system. In order to provide C-arm systems with an extended three-dimensional field of view, a C-arm X-ray imaging system (10), provided to acquire extended three-dimensional images of an object, is provided, comprising a C-arm structure (12) with an X-ray source (14) and an X-ray detector (16) mounted across from the X-ray source, a motorized drive (22) for a rotational movement of the C-arm structure, and a control unit (26). The C-arm structure is provided to perform a rotational scan around an axis of rotation and around an ISO-center acquiring a number of X-ray projections in order to generate image data for a reconstructed three-dimensional field of view. The control unit is configured to control the motorized drive, and to cause the rotational movement of the C-arm structure to perform a first rotational X-ray scan (50) around a first ISO-center (56) with a first axis of rotation for a first field of view, and to perform at least a second rotational X-ray scan (60) around a second ISO-center (62) with a second axis of rotation for a second field of view. The first and the second center of rotation are displaced in relatio…