X-ray imaging method
First Claim
1. An X-ray imaging methodcomprising forming and digitally storing a series of processed two-dimensional X-ray images of an object to be examined by use of a first imaging device, which projects radiation from an X-ray image through the object to be examined and onto an X-ray image pick-up device from different perspectives,forming a three-dimensional image of the same object to be examined by means of a second imaging device (2),extracting a relevant structure of the object to be examined from the three-dimensional image,calculating a series of synthetic, two-dimensional projection images of the extracted structure, the structure being projected with the same geometrical parameters as used for the same relevant structure during the formation of the individual X-ray images,forming a series of superposition images by superposing the synthetic projection images and the processed X-ray images formed from the same perspectives, anddisplaying the series of superposition images.
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Accused Products
Abstract
An X-ray imaging method, and device for carrying out the method, utilizes a first imaging device to form and digitally store a series of two-dimensional X-ray images in which an object to be examined is projected onto an X-ray image pick-up device from different perspectives, and a second imaging device to form a three-dimensional image of the same object. Quasi three-dimensional reproduction of anatomic structures is achieved by extracting a relevant structure of the object to be examined from the three-dimensional image, calculating synthetic, two-dimensional projection images of the extracted structure, the structure being projected with the same geometrical parameters as used for the relevant structure during the formation of the individual X-ray images, forming superposition images by superposing the synthetic projection images and the X-ray images formed under the same geometrical conditions, and displaying the series of superposition images.
177 Citations
9 Claims
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1. An X-ray imaging method
comprising forming and digitally storing a series of processed two-dimensional X-ray images of an object to be examined by use of a first imaging device, which projects radiation from an X-ray image through the object to be examined and onto an X-ray image pick-up device from different perspectives, forming a three-dimensional image of the same object to be examined by means of a second imaging device (2), extracting a relevant structure of the object to be examined from the three-dimensional image, calculating a series of synthetic, two-dimensional projection images of the extracted structure, the structure being projected with the same geometrical parameters as used for the same relevant structure during the formation of the individual X-ray images, forming a series of superposition images by superposing the synthetic projection images and the processed X-ray images formed from the same perspectives, and displaying the series of superposition images.
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8. An X-ray image processing device comprising a first imaging device with an X-ray source and an X-ray image pick-up device which are adjustable in relation to an object to be examined in order to form a series of two-dimensional X-ray images where the object to be examined is projected onto the image pick-up device from different perspectives, and also including means for storing the X-ray images and programmable image processing means which are programmed so that the following image processing operations are performed:
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b) extracting a relevant structure of the object to be examined from a three-dimensional image of the same object to be examined which has been formed by a second imaging device, c) calculating synthetic projection images of the extracted structure, the structure being projected with the same geometrical parameters as used for the relevant structure during the formation of the individual X-ray images, d) forming superposition images by superposing the synthetic projection images and the X-ray images formed from the same perspectives, and e) displaying the series of superposition images. - View Dependent Claims (9)
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Specification