Contrast increase in X-ray projection images and/or in tomographically reconstructed volumes by deconvolution of the projection images

US8199162B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Philipp Bernhardt · Forchheim, DE
• Bernhard Scholz · Heroldsbach, DE

Key dates

• Filing date: Aug 27, 2009
• Grant date: Jun 12, 2012
• Expiry date: Aug 25, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T5/73
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention relates to a method and a device for increasing contrast in medical images generated by an imaging system featuring an x-ray source and a detector. The detector detects x-rays of the x-ray source and converts image signals from the x-rays. The image signals are transferred to a control and processing unit for processing. Deconvolution of the image signals is carried out by application of an inverse modulation transfer function modified by a regularization. At least a volume image can be reconstructed from the deconvolved image signals.