Method for reconstructing a reconstruction data set containing two-dimensional virtual X-ray images

US9047498B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Frank Dennerlein · Forchheim, DE
• Anna Jerebko · Eschborn, DE

Key dates

• Filing date: Nov 29, 2012
• Grant date: Jun 2, 2015
• Expiry date: Nov 30, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2211/436
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A method reconstructs a reconstruction data set containing virtual X-ray images of projection images of a target region recorded with an X-ray device. The projection images being recorded at different positions of an X-ray source along a scanning trajectory. The method includes defining an imaginary position of the X-ray source for each virtual X-ray image. For each virtual X-ray image and each pixel to be reconstructed in the X-ray image a virtual beam section, covering the target region, of the path between the imaginary position of the X-ray source and the pixel is defined. For each projection image, an integral is determined from the relationships between the forward projection and the filtered back-projection by re-parameterizing. A projection value of the virtual X-ray image from the integrals determined is combined.