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Focus detector arrangement for generating phase-contrast X-ray images and method for this

A phase contrast and X-ray technology, which is applied to X-ray equipment, instruments for radiological diagnosis, measuring devices, etc., can solve problems such as poor imaging effect

Active Publication Date: 2007-08-08
SIEMENS HEALTHCARE GMBH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has been shown that imaging in such systems is only satisfactorily achieved in the region near the axis, and that imaging becomes increasingly poor with increasing fan and cone angles towards the edge of the detector

Method used

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  • Focus detector arrangement for generating phase-contrast X-ray images and method for this
  • Focus detector arrangement for generating phase-contrast X-ray images and method for this
  • Focus detector arrangement for generating phase-contrast X-ray images and method for this

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Embodiment Construction

[0089] In order to better understand the invention, the basic principle of phase contrast measurement is described below using FIGS. 1 to 3 . For this reason, the following basic explanation is given: All drawings are not standard views, but to list the basic structure and the described effects. The horizontal axis extends relative to the vertical axis (optical axis). The angle is thus shown exaggerated. Although it is the aim of the method to position the analysis gratings when the interference pattern is at its maximum, i.e. at the first Talbot distance, it is possible, in particular, for educational reasons to delineate some of the interferences spatially separated from each other. Graphics and analytics raster. Therefore, the parameters d and r 2 Not only about interference patterns, but also about analyzing gratings.

[0090] FIG. 1 shows coherent radiation from a point-shaped radiation source or approximately coherent radiation generated by a source grating which pas...

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Abstract

A focus-detector arrangement and an X-ray apparatus for generating projective or tomographic phase contrast recordings of a subject are disclosed. In at least one embodiment, the focus-detector arrangement includes a radiation source with a focus, arranged on a first side of the subject, for generating a fan-shaped or conical beam of rays; at least one X-ray optical grating arranged in the beam path, with at least one phase grating arranged on the opposite second side of the subject in the beam path generating an interference pattern of the X-radiation preferably, in a particular energy range; and an analysis-detector system which detects at least the interference pattern generated by the phase grating in respect of its phase shift with position resolution. According to at least one embodiment of the invention, at least one X-ray optical grating including bars which are free from overhangs form shadows in the beam path of the fan-shaped or conical beam of rays.

Description

technical field [0001] The invention relates to a focal point detector arrangement of an x-ray system for generating projection or tomographic phase-contrast photographs, which has a focal point for generating a fan-shaped or cone-shaped beam arranged on a first side of an examination object A radiation source, a phase grating arranged in the ray path on the opposite second side of the inspection object, the phase grating produces an interference pattern of X-ray radiation in a predetermined energy region of X-rays, and an analysis detection system, the analysis detection The system detects the interference pattern produced by the phase grating against the phase shift at least position-resolved. Background technique [0002] Such focus detector arrangements are known for producing projection or tomographic phase-contrast images of examination objects. See, for example, European patent application EP1447046A1 and the unpublished German patent applications with docket numbers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00G01N23/04G01N23/20G01N23/06H05G1/02H05G1/62G01T1/28G01T7/00G21K1/06G21K1/02
CPCA61B6/4291A61B6/484G01N2223/419G01N2223/612
Inventor 乔基姆·鲍曼克里斯琴·戴维马丁·恩格尔哈特乔尔格·弗罗伊登伯格埃克哈德·亨普尔马丁·霍黑塞尔托马斯·默特尔梅尔弗朗兹·法伊弗斯蒂芬·波普斯库曼弗雷德·舒斯特
Owner SIEMENS HEALTHCARE GMBH
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