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Method of determining the position of an object in an image

An image and object technology, applied in the field of determining the position of an object in an image

Inactive Publication Date: 2006-02-22
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the loss of certain image information cannot be avoided at the position of weak exposure

Method used

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  • Method of determining the position of an object in an image
  • Method of determining the position of an object in an image
  • Method of determining the position of an object in an image

Examples

Experimental program
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Embodiment Construction

[0028] figure 1 The key elements of an X-ray system shown schematically in Fig. . The X-ray source 1 and the X-ray detector 3 are usually placed on, for example, a C-shaped bracket (not shown) according to a fixed relative geometric position. Also visible is a data processing unit 2 , which is connected to the x-ray source 1 and the x-ray detector 3 for driving them and for receiving and further processing the x-ray images I recorded by the x-ray detector 3 . The data processing unit 2 is usually connected to an output device, such as a monitor, for displaying X-ray images to the user. The X-ray system also includes an examination table 4 on which a patient (not shown) to be X-rayed lies.

[0029] If, for example, a catheter study is fluoroscopyed with an X-ray system, the X-ray images generated at various times must be correlated with one another as precisely as possible. Ultimately, it must be possible to localize marked objects, such as the examination table 4 or points...

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PUM

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Abstract

The invention relates to a method of determining the position of an object in an (X-ray) image (I). A pattern of marking elements is attached to the object., wherein the marking elements are not visibly evident individually in the image (I), i.e. they form an invisible ''watermark''. By means of a correlation between the image (I) and a filter image (M) of the pattern of marking elements, however, the position of the marking elements, and thereby that of the object, can be localized in the image (I).

Description

technical field [0001] The invention relates to a method for determining the position of an object in an image, to a marking device used in this method, and to an X-ray system for implementing the method. Background technique [0002] Images of objects are generated in many different application areas and then analyzed for specific research purposes. In order to analyze such images it is often very important to be able to localize the position of at least one object in the image or a specific position of an object. The following uses medical X-ray images as an example to illustrate this kind of research. For example, for the precise guidance of a catheter with the aid of X-ray images, or to relate the various images of an image sequence to one another with a higher resolution (typically sub-millimeter level) , the examination table and / or the patient's organs must be positioned in the x-ray image with as much precision as possible. In fact, in principle, the position of t...

Claims

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Application Information

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IPC IPC(8): H04N1/00A61B6/00A61B6/02H04N1/32
CPCA61B6/5235A61B6/12A61B6/02
Inventor K·埃克
Owner KONINKLIJKE PHILIPS ELECTRONICS NV