Focus/detector system of an x-ray apparatus for generating phase contrast recordings

US7492871B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stefan Popescu · Erlangen, DE
• Björn Heismann · Erlangen, DE
• Eckhard Hempel · Bad Mergentheim, DE
• Christian David · Lauchringen, DE
• Franz Pfeiffer · Unterföhring, DE

Key dates

• Filing date: Jan 31, 2007
• Grant date: Feb 17, 2009
• Expiry date: Jan 31, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G21K2207/005
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A focus/detector system of an X-ray apparatus and a method for generating projective or tomographic phase contrast recordings, are disclosed. In an embodiment of the system, the system includes a beam source equipped with a focus and a focus-side source grating, arranged in the beam path and generates a field of ray-wise coherent X-rays, a grating/detector arrangement having a phase grating and grating lines arranged parallel to the source grating for generating an interference pattern, and a detector having a multiplicity of detector elements arranged flat for measuring the position-dependent radiation intensity behind the phase grating. Finally, the detector elements are formed by a multiplicity of elongate scintillation strips, which are aligned parallel to the grating lines of the phase grating and have a small period, whose integer multiple corresponds to the average large period of the interference pattern which is formed by the phase grating.