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Frequency dependent combination of x-ray images of different modalities

An X-ray and image technology, applied in the field of X-ray imaging, can solve unfamiliar problems

Inactive Publication Date: 2014-04-16
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

All other image types will have different characteristics and thus will be unfamiliar to observers familiar with ordinary absorption X-ray images

Method used

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  • Frequency dependent combination of x-ray images of different modalities
  • Frequency dependent combination of x-ray images of different modalities
  • Frequency dependent combination of x-ray images of different modalities

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Experimental program
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Embodiment Construction

[0028] One possibility to obtain combined image information is based on the idea of ​​dividing the image information of the first image information type and the second image information type in the spatial frequency domain into a number of distinct subbands, i.e. each subband corresponds to over a defined spatial frequency range. For example, such division may be performed by employing a Laplacian pyramid process.

[0029] Respective frequency sub-bands of the image information may be analyzed, for example with respect to their contrast-to-noise ratio, said respective frequency sub-bands may be weighted in particular according to the determined signal-to-noise ratio, and at least depending on the weighting factors of the respective sub-bands, subsequently The various frequency sub-bands may be added or recombined to finally obtain a single combined image, combining two or more relevant information of different image information types in a manner with an optimal signal-to-noise...

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Abstract

The present invention relates to X-ray imaging technology. In phase-contrast imaging, different types of image information, e.g. absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process. Individual types of image information comprise different image properties. The present invention relates to a frequency dependent combination of different types of image information to obtain a combined image having improved properties over the individual image information and their respective image information type. Accordingly, an apparatus (56) as well as a method (100) for image processing in X-ray imaging of an object is provided comprising receiving (102) first image information of the object of a first image information type, receiving (104) second image information of the object of a second image information type,wherein the second image information type is different from the first image information type. Subsequently the first image information and the second image information is combined(106)to obtain combined image information of the object, wherein the combination of the first image information and the second image information is a frequency-dependent combination, depending on the spatial frequency of the first image information and the second image information.

Description

technical field [0001] The present invention generally relates to X-ray imaging techniques and image post-processing. [0002] In particular, the invention relates to an apparatus and method for image processing in X-ray imaging of objects. [0003] In particular, the invention relates to the combination of different x-ray image information types acquired substantially simultaneously as a function of the frequency of the individual image information types, in particular depending on the spatial frequency of the image information. Background technique [0004] In general X-ray imaging, objects of interest are examined by taking absorption measurements of X-radiation that penetrates the object of interest. While small differences in absorption within an object can be shown with sufficient detail, regions within an object with similar chemical composition (and thus similar absorption properties) can only be shown with less than satisfactory detail. [0005] Developments in X-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50
CPCG06T11/60G06T5/50A61B6/484G06T2207/20056G06T2207/20221G06T2207/10116G06T2207/30004
Inventor H-I·马克E·勒斯尔T·克勒R·普罗克绍
Owner KONINKLJIJKE PHILIPS NV