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X-ray spectral imaging method and system

A tomography, coefficient technology, used in radiological diagnostic image/data processing, image enhancement, image generation, etc.

Active Publication Date: 2019-09-20
PRISMATIC SENSORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] All X-ray imaging systems have limited resolution

Method used

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  • X-ray spectral imaging method and system
  • X-ray spectral imaging method and system
  • X-ray spectral imaging method and system

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Embodiment Construction

[0053] Before describing the invention itself, it is useful to begin with a brief introduction to nonlinear partial volume (NLPV) effects. This effect is produced in projection X-ray imaging and computed tomography when either the light source or the detector elements (or both) are extended, ie, do not resemble a point. The X-ray intensity measured by the X-ray element is the overall intensity covering all projected lines from the source to the detector, as in figure 1 In the example shown.

[0054] To illustrate how the NLPV effect arises, consider the optimal case when the light source is point-like and located far from the object, while the detector is extended such that the rays from the light source to the detector are substantially parallel. exist Figure 2A to Figure 2C In the case shown in , the X-rays pass through the 1 and μ 2 The volume of the two materials. It is assumed that all X-rays penetrating the volume are measured by a single detector unit. If X-rays ...

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Abstract

There is provided a method for processing a radiographic image acquired with at least two energy levels. A first step (S1) involves providing energy-resolved image data representative of the radiographic image with at least two energy levels, e.g. from a detector or from an intermediate storage. A second step (S2) involves decomposing the provided image data into at least one basis image representation, based on a model where a combination of at least two basis functions is used to express a representation of at least one linear attenuation coefficient, and where at least one basis function models a physical material and at least one other basis function models the Non-Linear Partial Volume, NLPV, effect.

Description

technical field [0001] The techniques described herein relate generally to radiographic imaging, such as x-ray imaging, and more particularly to systems and methods for forming radiographic images Background technique [0002] Radiographic imaging, such as X-ray imaging, has been employed for many years in medical applications and for non-destructive testing. [0003] Typically, an X-ray imaging system includes an X-ray light source and an X-ray detector including a plurality of detector units. The X-ray source emits X-rays which pass through the object or object to be imaged and are then recorded by the detector. Because some materials absorb a greater portion of the X-rays than others, the interior of the subject or object is imaged. [0004] An X-ray computed tomography (CT) system includes an X-ray source and an X-ray detector configured such that projection images of a subject or object are available from different viewing angles over a range of at least 180 degrees. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/00G06T7/00A61B6/00A61B6/03G01N23/04G01N23/046G01N23/087
CPCA61B6/032A61B6/482A61B6/5205A61B6/5258G01N23/044G01N23/087G06T11/005G06T2211/408A61B6/03A61B6/52G01N23/046G06T7/0012G06T2207/10081G06T2207/30004
Inventor 马特斯·佩尔松
Owner PRISMATIC SENSORS