Method for generating a 3D reconstruction of a body

US7742557B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Thomas Brunner · Koblenzer Straße, DE
• Benno Heigl · Coburg, DE
• Holger Kunze · Bubenreuth, DE
• Florian Vogt · Bad Schönborn, DE

Key dates

• Filing date: Jun 5, 2008
• Grant date: Jun 22, 2010
• Expiry date: Dec 23, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2211/432
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method for generating a 3D reconstruction of an especially large body that cannot be captured by a single projection by capturing at least two projections, which together capture the body, at each of the positions taken up by a C-arm X-ray unit. Data from the two projections is projected onto a virtual detector and the data from the virtual detector is then used for the filtered back projection procedure. It is assumed here that the real source remains motionless and that only the detector moves. A virtual detector D1′/D2′ is only used in order to carry out large scale filtering in the event that real sources Q1 and Q2 for the two projections do not coincide. A return is then made to two independent projections. These two independent projections are used separately in the filtered back projection procedure to generate the 3D reconstruction.