Source-detector arrangement

US10485492B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Thomas Koehler · Norderstedt, DE
• Ewald Roessl · Ellerau, DE
• Rolf Karl Otto Behling · Norderstedt, DE
• Peter Benjamin Theodor Noel · Unterföhring, DE
• Franz Pfeiffer · Unterföhring, DE

Key dates

• Filing date: Nov 10, 2015
• Grant date: Nov 26, 2019
• Expiry date: Jul 27, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J2235/086
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention relates to a source-detector arrangement (11) of an X-ray apparatus (10) for grating based phase contrast computed tomography. The source-detector arrangement comprises an X-ray source (12) adapted for rotational movement around a rotation axis (R) relative to an object (140) and adapted for emittance of an X-ray beam of coherent or quasi-coherent radiation in a line pattern (21); and an X-ray detection system (16) including a first grating element (24) and a second grating element (26) and a detector element (6); wherein the line pattern of the radiation and a grating direction of the grating elements are arranged orthogonal to the rotation axis; and wherein the first grating element has a first grating pitch varied dependent on a cone angle (β) of the X-ray beam and/or the second grating element has a second grating pitch varied dependent on the cone angle of the X-ray beam.