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X-ray unit with slit aperture

A technology of X-ray and aperture, applied in the field of X-ray unit, to achieve the effect of low cost, simple technology and easy realization

Active Publication Date: 2015-02-11
SIEMENS HEALTHCARE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem gets worse as the width or number of rows of modern X-ray detectors increases

Method used

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  • X-ray unit with slit aperture
  • X-ray unit with slit aperture
  • X-ray unit with slit aperture

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 An x-ray unit according to the invention in the form of a computed tomography machine is shown, which has a recording unit comprising an x-ray emitter 8 and an x-ray detector 9 . The recording unit rotates about the longitudinal axis 5 during recording of the X-ray projections, and the X-ray emitter 8 emits X-rays in the form of an X-ray beam during recording. In particular, the x-ray beam can be fan-shaped or cone-shaped. A computed tomography apparatus can also have more than just one x-ray emitter 8 and more than just one x-ray detector 9 in order to enable recording according to the so-called dual-energy method. In the example shown here, the x-ray emitter 8 is an x-ray tube. In the example shown here, the x-ray detector 9 is a line detector with a plurality of lines, for example with 128 lines or with 256 lines. However, the x-ray detector 9 can also be designed as a planar detector. The x-ray detector 9 is generally designed as a scintillation counter...

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Abstract

The present invention includes an X-ray unit with a slit aperture. The X-ray unit of the present invention is designed to move a detection object at a feeding speed along a vertical shaft. The X-ray unit may also include a recording unit which is allowed to rotate around the vertical shaft. The recording unit comprises an X-ray emitter for emitting X-ray beams and an X-ray detector for detecting X-ray. Selective irradiation on effective area is achieved in a spiral mode by employing a first slit aperture, which is provided with a first opening that is along the vertical shaft and has a width of D_1, used for generating X-ray beam at the vertical shaft with a width of DZ_1, and fixedly positioned; and a second slit aperture which is provided with a second opening that is along the vertical shaft and has a width of D_2, used for generating X-ray beam at the vertical shaft with a width of DZ_2, and fixedly positioned; wherein DZ_2< DZ_1.

Description

technical field [0001] The invention relates to an x-ray unit and a method for recording x-ray projections. Background technique [0002] Computed tomography is an imaging method that is mainly used in medical diagnosis and for material inspection. To record tomographic x-ray images, the x-ray emitter and the cooperating x-ray detector are rotated around the examination object. In helical mode, the examination object is moved along the axis of rotation while X-ray projections are recorded at different angular positions. After recording the x-ray projections in helical mode, the x-ray projections are processed in order to generate a three-dimensional tomographic x-ray image. The area of ​​the examination object to be reconstructed is also referred to as effective volume. The recording of X-ray projections in helical mode is also called helical scanning. [0003] In order to reconstruct a tomographic X-ray image, the set of X-ray projections recorded during the helical sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/06A61B6/03G01N23/06G21K1/04H05G1/02
CPCG21K1/04H05G1/02G01N23/06A61B6/06A61B6/03A61B6/037A61B6/405A61B6/5205
Inventor T.阿尔门丁格R.劳帕克
Owner SIEMENS HEALTHCARE GMBH
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