X-ray device having a dual energy mode and method to analyze projection images detected in the dual energy mode

US7860288B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Philipp Bernhardt · Forchheim, DE
• Estelle Camus · Erlangen, DE
• Martin Hoheisel · Erlangen, DE
• Thomas Redel · Baiersdorf, DE

Key dates

• Filing date: May 31, 2007
• Grant date: Dec 28, 2010
• Expiry date: Oct 27, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/30101
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sequence of groups of projection images shows an object under examination comprising a vascular system and its environment. A computer determines a 2-dimensional evaluation image having a plurality of pixels based on combination images determined from the projection images of a group. The combination images have a plurality of pixels with pixel values. The sequence of the combination images shows the time characteristic of the distribution of a contrast medium in the object. The pixels of the evaluation image correspond to those of the projection images. The computer assigns each pixel, at least in a part area of the evaluation image, a type that is characteristic of whether the respective pixel corresponds to a vessel of the vascular system, a perfusion area or a background. It performs the assignment of the type on the basis of the time characteristic of the pixel values of the combination images.