Processing of images in a direction of succession
AssigneeKoninklijke Philips N.V.
InventorsFrans Andreas Gerritsen, Marcel Breeuwer, Bert Leo Alfons Verdonck
Life of this patent
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Abstract
The invention relates to the processing of a series of images. A multi-dimensional data set is formed from the series of images, for example, by stacking the images in order of succession. A cut plane is taken through the stack, that is, in the direction of succession and a slice through the stack is taken along the cut plane. A region of interest is derived from the slice. The invention is particularly useful for cardiology where a stack of successive MR images of a moving heart is formed. The ventricles of the heart are accurately segmented while using the slice in the direction of the time axis.
Claims7
A method for processing images, in which individual images succeed one another in a direction of succession, the method comprising:
- constructing a multi-dimensional data set from the individual images, wherein the multi-dimensional data set assigns data values to positions in a multi-dimensional space, and the multi-dimensional space is set up by the direction of succession and two directions parallel to the surface of the individual images;
- reconstructing a slice through the multi-dimensional data set along a cut plane through the multi-dimensional space and intersecting the individual images, wherein the cut plane is oriented based on a priori information concerning a region of interest, wherein the orientation of the cut plane is non-orthogonal to the direction of succession;
- locating an edge of the region of interest in all of the individual images based on an intersection of the cut lane with the edge of the region of interest in less than all of the individual images;
- segmenting the region of interest in the individual images, wherein the segmenting is performed on the basis of (i) information in the reconstructed slice along the cut plane through the multi-dimensional data set and (ii) a location of the edge of the region of interest;
- wherein the direction of the cut plane has a component in the direction of succession, and in which a the region of interest is located on the basis of the cut plane.
An image processing system carried out by a processor, that is arranged
- (i) to process individual images that succeed one another in a direction of succession,
- (ii) to reconstruct a multi-dimensional data set from the individual images, which multi-dimensional data set assigns data values to positions in multi-dimensional space, which multi-dimensional space is set up by the direction of succession and two directions parallel to the surface of the individual images;
- (iii) to reconstruct a slice through the multi-dimensional data set along a cut plane through the multi-dimensional space, wherein the cut plane is oriented based on a prior information concerning a region of interest, wherein the orientation of the cut plane is non-orthogonal to the direction of succession;
- (iv) to locate an edge of the region of interest in all of the individual images based on an intersection of the cut plane with the edge of the region of interest in less than all of the individual images;
- and
- (v) to segment the region of interest from one or more relevant images in the individual images, wherein:
- the segmentation is performed on the basis of (a) information in the reconstructed slice along the cut plane through the multi-dimensional data set and a location of the edge of the region of interest;
- and
- the direction of the cut plane has a component in the direction of succession, and to locate a region of interest on the basis of the cut plane.
A non-transitory computer readable medium storing a computer program with instructions for processing individual images that succeed one another in a direction of succession, and for:
- reconstructing a multi-dimensional data set from the individual images, which multi-dimensional data set assigns data values to positions in a multidimensional space, which multi-dimensional space is set up by the direction of succession and two directions parallel to the surface of the individual images;
- reconstructing a slice through the multi-dimensional data set along a cut plane through the multi-dimensional space, wherein the cut plane is oriented based on a prior information concerning a region of interest, wherein the orientation of the cut plane is non-orthogonal to the direction of succession;
- locating an edge of the region of interest in all of the individual images based on an intersection of the cut plane with the edge of the region of interest in less than all of the individual images;
- segmenting the region of interest from one or more relevant images in the individual images, wherein the segmenting is performed on the basis of (i) the information in the reconstructed slice along the cut plane through the multi-dimensional data set and (ii) a location of the edge of the region of interest;
- wherein the direction of the cut plane has a component in the direction of succession, and for locating a region of interest on the basis of the cut plane.
Dependencies are inferred from the claim text.