Scanning system for differential phase contrast imaging

US9750465B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Klaus Juergen Engel · Aachen, DE
• Dieter Geller · Aachen, DE
• Gereon Vogtmeier · Aachen, DE
• Thomas Koehler · Norderstedt, DE

Key dates

• Filing date: Dec 8, 2010
• Grant date: Sep 5, 2017
• Expiry date: Apr 9, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/5241
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention relates to the field of X-ray differential phase contrast imaging. For scanning large objects and for an improved contrast to noise ratio, an X-ray device (10) for imaging an object (18) is provided. The X-ray device (10) comprises an X-ray emitter arrangement (12) and an X-ray detector arrangement (14), wherein the X-ray emitter arrangement (14) is adapted to emit an X-ray beam (16) through the object (18) onto the X-ray detector arrangement (14). The X-ray beam (16) is at least partial spatial coherent and fan-shaped. The X-ray detector arrangement (14) comprises a phase grating (50) and an absorber grating (52). The X-ray detector arrangement (14) comprises an area detector (54) for detecting X-rays, wherein the X-ray device is adapted to generate image data from the detected X-rays and to extract phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object (18). The object (18) has a region of interest (32) which is larger than a detection area of the X-ray detector (18) and the X-ray device (10) is adapted to generate image data of the region of interest (32) by moving the object (18) and the X-ray de…