Structured electron emitter for coded source imaging with an x-ray tube

A technology for electron emitters and X-ray tubes, which is applied to X-ray tube electrodes, parts of X-ray tubes, instruments used for radiological diagnosis, etc., and can solve problems such as resolution deterioration.

Inactive Publication Date: 2012-02-29
KONINKLIJKE PHILIPS ELECTRONICS NV
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the achievable resolution always depends on the geometric extension of a single X-ray source, such an increase in source size will lead to a deterioration of the achievable resolution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Structured electron emitter for coded source imaging with an x-ray tube
  • Structured electron emitter for coded source imaging with an x-ray tube
  • Structured electron emitter for coded source imaging with an x-ray tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0089] refer to figure 1 The principle of encoding source imaging using an embodiment of the present invention will be described. The X-ray tube 100 is adapted not only to emit a single X-ray beam, but also to emit several spaced apart X-ray beams 102 . X-ray beam 102 is directed at and transmitted through object 104 . Then, the transmitted X-rays are projected onto the X-ray detector 106 . On a detection surface of the detector 106, several at least partially overlapping projections of the object 104 produced by the plurality of X-rays 102 are obtained. The detector 106 then transmits the detected image to the image processor 108 . The image processor 108 then derives an image of the object 104 by deconvolving the detected image using previously provided information about the precise arrangement and size of the plurality of X-rays 102 emitted from the X-ray tube 100 information. Thereby, a final image 110 of the object 104 can be obtained, wherein the final image has a h...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An electron emitter (1) and an X-ray tube (100) comprising such electron emitter (1) are presented. The electron emitter (1) comprises a cathode (3) and an anode (5) wherein the cathode (3) comprises an electron emission pattern (9) of a plurality of local areas (11) spaced apart from each other, each area being adapted for locally emitting electrons via field emission upon application of an electrical field between the cathode (3) and the anode (5). Electron beams (15) emitted from the local areas (11) may generate several X-ray source intensity maxima in a specific geometric pattern. An apparent loss in spatial resolution due to overlapping images on a detector can be corrected by using specific intensity patterns for the X-ray source (100) and by applying dedicated decoding algorithms on the acquired image such as coded source imaging (CSI).

Description

technical field [0001] The invention relates to electron emitters for X-ray tubes. Furthermore, the invention relates to an X-ray tube comprising such an electron emitter and to an X-ray image acquisition device comprising such an X-ray tube. Furthermore, the invention relates to a method of acquiring an image of an object, for example by transmission radiography with X-rays, a computer program element adapted to control such a method when executed on a processor, and a computer program element on which such a computer program element is stored. computer readable media. Background technique [0002] Conventional X-ray imaging applications based on transmission radiography generally rely on the principle of an ideal point X-ray source. However, an ideal point-like source may never be realized, and practical X-ray sources always have a spatial extension which to some extent determines the spatial resolution of the imaging system. Therefore, imaging applications place constr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/06A61B6/00G01V5/00H01J1/304H01J3/02
CPCA61B6/4441H01J1/304H01J35/065H01J2201/30469H01J2235/062H01J2235/068A61B6/4028G01N23/04
Inventor M·K·迪尔
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap