Method for reconstructing a three-dimensional image volume and x-ray devices

US7711083B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Benno Heigl · Coburg, DE
• Stefan Hoppe · Berching, DE
• Joachim Hornegger · Effeltrich, DE
• Ernst-Peter Rührnschopf · Erlangen, DE
• Holger Scherl · Bad Hersfeld, DE
• Bernhard Scholz · Heroldsbach, DE
• Michael Zellerhoff · Forchheim, DE

Key dates

• Filing date: Aug 30, 2007
• Grant date: May 4, 2010
• Expiry date: Jul 23, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2223/612
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

To enable an artifact free reconstruction even in the case of large regions of interest and with scanning paths of below 360°, provision is made for a method, with which a three-dimensional image volume is reconstructed from a number of two-dimensional projection images of a region of interest, which were recorded about the region of interest during a rotation of a recording system, comprising an x-ray source with a focal point and a detector, by calculating the gray scale values of the voxels of the image volume by back projection of the projection images, with which each two-dimensional projection images is composed in each instance from at least two individual projection images to form an extended two-dimensional projection image, with the respectively at least two individual projection images being recorded with a constant relative position between the focal point and the region of interest.