Method for motion correction in a series of images of a rigid body
AssigneeSiemens Aktiengesellschaft
InventorStefan Thesen
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Abstract
The invention is directed to a method for motion correction given series of two-dimensional images of a rigid body, whereby the rigid body does not lie completely in the coverage area of the images and is cut off at one image edge or, respectively, at two image edges that do not lie opposite one another. Given two time-successive images, the mirror image or, respectively, the mirror images of the other are respectively attached to the one. A simple motion correction method is then implemented between the two newly arisen images that now show an approximately rigid body that lies completely within the coverage area of these newly arisen images.
Claims16
A method for motion correction in a series of two-dimensional images of a rigid body, said images respectively having image edges defining a coverage area wherein the rigid body does not lie completely in the coverage area of the images and is cut off at one of said image edges, comprising the steps of:
- a) selecting first and second chronologically successive images in said series, between which the motion correction is to be implemented, and respectively mirroring said first and second images at said one of said image edges thereby producing two mirror images;
- b) attaching the first image and the mirror image of the second image and attaching the second image and the mirror image of the first image at said one of said image edges thereby producing two new images that show a rigid body in a good approximation lying completely within said new images;
- c) determining motion parameters for time-successive images of said rigid body from the two new images according to a motion correction method;
- and
- d) correcting said first image and said second image using said motion parameters.
A method for motion correction in a series of two-dimensional images of a rigid body, said images respectively having image edges defining a coverage area, said image edges including two image edges that do not lie opposite each other and wherein the rigid body does not lie completely in the coverage area of the images and is cut off by said two image edges comprising the steps of:
- a) selecting first and second time-successive images in said series, between which the motion correction is to be implemented, and respectively mirroring said first and second images at each of said two image edges and at a point of intersection of said two image edges, thereby producing three mirror images for each of said first and second images;
- b) attaching the three mirror images acquired from the second image to the first image respectively at said two image edges, and attaching the three mirror images acquired from the first image to the second image respectively at said two image edges, thereby producing two new images that show a rigid body in a good approximation, lying completely within said new images;
- c) determining motion parameters for time-successive images of a rigid body from the two new images according to a motion correction method;
- and
- d) correcting said first image and said second image using said motion parameters.
Dependencies are inferred from the claim text.