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Translational x-ray beam emission profile shaper

A shaper, X-ray technology, used in instruments for radiological diagnosis, material analysis using radiation, diaphragms for radiological diagnosis, etc., can solve problems such as increased patient dose, image quality degradation, and no

Active Publication Date: 2020-05-05
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the x-ray spectrum of the beam used to scan the object or target may not be optimal and / or the desired x-ray spectrum, which can degrade image quality
In addition, bowtie filter 102 filtering can produce undesired scatter that can degrade image quality and increase patient dose

Method used

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  • Translational x-ray beam emission profile shaper
  • Translational x-ray beam emission profile shaper
  • Translational x-ray beam emission profile shaper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] image 3 An imaging system 300 such as a computed tomography (CT) scanner is illustrated. The imaging system 300 includes a fixed gantry 302 and a rotating gantry 304 rotatably supported by the fixed gantry 302 . The rotating gantry 304 rotates about an inspection zone 306 about a longitudinal or z-axis.

[0027] A radiation source 308 , such as an X-ray tube, is supported by the rotating gantry 304 and rotates with the rotating gantry 304 about the examination region 306 . The radiation source 308 emits a radiation beam 310 from a focal spot 312 of an anode (not visible) of the source 308 substantially in all directions, including the direction of the examination region 306 .

[0028] A source collimator 314 collimates the beam 310 to a predetermined geometry of interest, including a fan, cone, wedge, or other shaped beam 310 that traverses the examination region 306 .

[0029] Radiation sensitive detector array 316 is positioned opposite radiation source 308 on the...

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PUM

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Abstract

An imaging system (300) includes a radiation source (308) that emits radiation that traverses in a direction of an examination region (306) during a scan and a detector array (316) located opposite the radiation source, across the examination region, which detects radiation traversing the examination region during the scan and produces a signal indicative thereof. A beamshaper (318), located between the radiation source and the examination region, defines a flux intensity profile of the radiation beam traversing the examination region. The beamshaper includes a plurality of x-ray attenuating elements(326), which attenuate x-rays incident thereon, interleaved with a plurality of material free regions, which pass x-ray unattenuated. A transmittance of the x-rays is greater nearer a center region of the beamshaper relative to ends regions of the beamshaper. A beamshaper mover (328) translates the beamshaper during at least one acquisition interval of the scan.

Description

technical field [0001] The following generally relates to a translational X-ray beam shaper comprising an attenuating region and a non-attenuating region and configured to shape an emission flux profile during at least one acquisition interval and to The specific application of computed tomography (CT) is described; however, the following is also applicable to other imaging modalities, such as X-ray. Background technique [0002] A CT scanner comprises an X-ray tube which emits radiation from a focal spot in the direction of the examination region. A source collimator is positioned between the focal spot and the examination region and collimates the emitted radiation to produce a beam of predetermined geometry (eg, fan-shaped or conical, etc.). The collimated beam passes through the examination region and portions of the target or object therein (which attenuates the beam according to the radiation density of the target or object) and illuminates a detector array disposed i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/00A61B6/06G21K1/04
CPCA61B6/06A61B6/4035A61B6/405G01N23/04G21K1/10G21K1/043
Inventor O·奥弗O·扎尔钦
Owner KONINKLJIJKE PHILIPS NV