System and method for correcting motion artifacts by combining images in phase-contrast and dark-field imaging applications

US12272036B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Thomas Koehler · Norderstedt, DE
• ANDRIY YAROSHENKO · Garching bei München, DE
• Hanns-Ingo Maack · Norderstedt, DE
• Thomas Pralow · Kürten, DE
• Bernd Lundt · Hamburg, DE

Key dates

• Filing date: Nov 20, 2020
• Grant date: Apr 8, 2025
• Expiry date: Oct 30, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/20212
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A system (IPS) and related method for image processing, in particular dark-field or phase contrast imaging to reduce motion artifacts. The system comprises an input interface (IN) for receiving a series of projection images (π) acquired by an X-ray imaging apparatus (XI) of an object (OB) for a given projection direction, the imaging apparatus (XI) configured for phase-contrast and/or dark-field imaging A phase-contrast and/or dark-field image generator (IGEN) applies an image generation algorithm to compute a first image based on the series the projection images (π). A motion artifact detector (MD) detects a motion artifact in the first image. A combiner (Σ) combines, if a motion artifact is so detected, a part of the first image with a part of at least one auxiliary image to obtain a combined image. The auxiliary image was previously computed by a gated application of the image generation algorithm in respect of a subset of the series of the projection images (π). The combined image may be output at an output interface (OUT) as a motion artifact reduced image.