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Method and computer program product for registering biomedical images with reduced imaging arefacts caused by object movement

It is a technology of object movement and biomedicine, which is applied in computing, image enhancement, image analysis, etc., and can solve the problems of result influence, wrong image registration, etc.

Active Publication Date: 2008-02-27
BRACCO IMAGINIG SPA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can lead to wrong image registration and affect the results

Method used

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  • Method and computer program product for registering biomedical images with reduced imaging arefacts caused by object movement
  • Method and computer program product for registering biomedical images with reduced imaging arefacts caused by object movement
  • Method and computer program product for registering biomedical images with reduced imaging arefacts caused by object movement

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Embodiment Construction

[0056] Although a related aspect of the present invention is the generalization of the Lucas & Kanade algorithm from 2D to 3D, the illustrations below relate only to 2D images for easier understanding. A generalization of the method to three-dimensional images is given in a general description expressed in mathematical formulations.

[0057] Automatic feature selection in sets of cross-sectional images that work in 3D and thus to represent 3D volume data is essentially a generalization of Lucas&Kanade's 2D feature detection algorithm and is explained in more detail below:

[0058] Two image volumes of the same patient recorded within a short time difference were defined as I and J, respectively.

[0059] Within the first image volume I, a certain number of selected voxels must be identified, which will be considered features to be tracked between the two volumes.

[0060] Let I be the original / first image volume and J be the next volume in which to find the corresponding feat...

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Abstract

A method of registering biomedical images to reduce imaging artefacts caused by object movement is disclosed, wherein a certain number of features or landmarks is automatically defined and tracked in a first and second image to be registered to determine the optical flow vector between the first and second image. Registration then takes place by applying the inverse optical flow to the second image. The automatic feature selection step is carried out by determining the mean signal intensity in a defined neighborhood for every pixel, which mean signal intensity is then compared to a predetermined threshold. If the mean signal intensity value of said neighborhood is higher than the predetermined threshold the pixel is defined as a feature and is added to a list of features to be tracked.

Description

technical field [0001] The present invention relates to a method for image registration, which consists of the following steps: [0002] a) providing at least a first and a second digital or digitized image of the same object, or at least a first and a second set of cross-sectional images of the object, the images being formed by a two-dimensional or three-dimensional array of pixels or voxels; [0003] b) in the first image or group of images, by selecting a certain number of pixels or voxels, setting these pixels or voxels as signs or features, to define a certain number of signs, so-called features, and generating a list of said characteristics to track; [0004] c) From the first to the second image by determining the optical flow vector from the first to the second image or from the first group to the second group of images for each pixel or voxel selected as a feature or from the first set to the second set of images, tracking the position of each pixel or voxel select...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T3/00
CPCG06T3/0075G06T7/0038G06T7/0028G06T2207/30068G06T7/33G06T7/38G06T3/147
Inventor 托尼·维尔纳·沃姆维格海纳·法贝尔迪尔克·迈耶
Owner BRACCO IMAGINIG SPA
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