Method for the presentation of projection images or tomograms from 3D volume data of an examination volume
First Claim
1. A method for presenting a projection image from 3D volume data representing an examination volume, comprising the steps of:
- from 3D volume data representing an examination volume, calculating a grayscale image in a computer of a selected projection of said examination volume, said grayscale image comprising a plurality of pixels respectively representing voxels in said examination volume;
in said computer, for each of said pixels calculating a distance of the voxel represented thereby from a reference plane, each distance having a magnitude;
in said computer, color-coding said pixels with respective chromatic values dependent on the magnitude of the distance calculated for that pixel; and
displaying said selected projection on an electronic display as a combination of said grayscale image and said color-coded pixels.
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Abstract
In a method for the presentation of projection images or tomograms from 3D volume data of an examination volume, particularly from MR or CT volume data, a grayscale image of a prescribable projection or of a prescribable section that is composed of individual pixels is calculated from the 3D volume data. The distance of a voxel or partial volume of the examination volume represented by the pixel from a reference plane is determined for each pixel of the grayscale image, and a chromatic value corresponding to this distance is allocated to each pixel of the grayscale image, the chromatic value is obtained by color coding of the distance, and a projection image or tomogram is presented by overlaying or coloring the grayscale image with the chromatic values allocated to each pixel. The presentation of a projection image with an unambiguous and immediately understandable depth, information is thereby enabled.
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Citations
23 Claims
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1. A method for presenting a projection image from 3D volume data representing an examination volume, comprising the steps of:
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from 3D volume data representing an examination volume, calculating a grayscale image in a computer of a selected projection of said examination volume, said grayscale image comprising a plurality of pixels respectively representing voxels in said examination volume;
in said computer, for each of said pixels calculating a distance of the voxel represented thereby from a reference plane, each distance having a magnitude;
in said computer, color-coding said pixels with respective chromatic values dependent on the magnitude of the distance calculated for that pixel; and
displaying said selected projection on an electronic display as a combination of said grayscale image and said color-coded pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for presenting a tomogram from 3D volume data representing an examination volume, comprising the steps of:
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from 3D volume data representing an examination volume, calculating a grayscale image in a computer of a selected section of said examination volume, said grayscale image comprising a plurality of pixels respectively representing partial volumes in said examination volume;
in said computer, for each of said pixels calculating a distance of the partial volume represented thereby from a reference plane, each distance having a magnitude;
in said computer, color-coding said pixels with respective chromatic values dependent on the magnitude of the distance calculated for that pixel; and
displaying said selected section on an electronic display as a combination of said grayscale image and said color-coded pixels. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification