Three-dimensional image processing apparatus
First Claim
1. A three-dimensional image processing apparatus comprising:
- memory means for storing first voxel data representing an object in a three-dimensional space;
extracting means for extracting a plurality of second voxel data representing a plurality of tissues from the first voxel data stored in said memory means;
first designating means for designating a predetermined plane in the three-dimensional space as a projection plane;
distance detecting means for detecting distances between pixels in the projection plane and voxels in each of said plurality of second voxel data;
second designating means for designating a predetermined range in the projection plane as a cutting area;
third designating means for designating a cutting depth in the cutting area;
distance correcting means for correcting the distances detected by said distance detecting means in accordance with the cutting depth;
minimum distance detecting means for detecting a minimum value of the distances between the pixels in the projection plane and the voxels in each of said plurality of second voxel data; and
surface image generating means for generating a surface image in accordance with the minimum value of the distances of the pixels in the projection plane obtained by said minimum distance detecting means.
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Accused Products
Abstract
A three-dimensional image processing apparatus includes a first three-dimensional memory for storing first voxel data representing a three-dimensional CT image, a level detector for comparing the first voxel data with CT values of an epidermis, a bone, and a blood vessel, second three-dimensional memories for storing second voxel data (binary) of the epidermis, the bone, and the blood vessel obtained by the level detector, a distance detector for detecting distances between a predetermined projection plane in a three-dimensional space and the second voxel data, a minimum detector for detecting a distance between the projection plane and one of the second voxel data of the epidermis, bone, and blood vessel, which is closest to the projection plane, and a surface image generating circuit for shading minimum values of pixels in the projection plane to generate a surface image. The projection plane in the three-dimensional space is partially moved into a memory space in the second voxel data, thereby simulating a surface image obtained when a three-dimensional CT image is cut.
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Citations
8 Claims
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1. A three-dimensional image processing apparatus comprising:
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memory means for storing first voxel data representing an object in a three-dimensional space; extracting means for extracting a plurality of second voxel data representing a plurality of tissues from the first voxel data stored in said memory means; first designating means for designating a predetermined plane in the three-dimensional space as a projection plane; distance detecting means for detecting distances between pixels in the projection plane and voxels in each of said plurality of second voxel data; second designating means for designating a predetermined range in the projection plane as a cutting area; third designating means for designating a cutting depth in the cutting area; distance correcting means for correcting the distances detected by said distance detecting means in accordance with the cutting depth; minimum distance detecting means for detecting a minimum value of the distances between the pixels in the projection plane and the voxels in each of said plurality of second voxel data; and surface image generating means for generating a surface image in accordance with the minimum value of the distances of the pixels in the projection plane obtained by said minimum distance detecting means. - View Dependent Claims (2, 3, 4)
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5. A three-dimensional image processing apparatus comprising:
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memory means for storing voxel data representing a three-dimensional object; extracting means for extracting sectional data representing axial, coronal, and sagittal images from the voxel data stored in said memory means; and means for affine-transforming the sectional data extracted by said extracting means and three-dimensionally combining the affine-transformed sectional data based on a view direction, thereby generating a volume multi-plane reconstruction image. - View Dependent Claims (6, 7)
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8. A three-dimensional image processing apparatus comprising:
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memory means for storing first voxel data representing an object in a three-dimensional space; first extracting means for extracting a plurality of second voxel data representing three-dimensional objects of a plurality of tissues from the first voxel data stored in said memory means; designating means for designating a predetermined plane in the three-dimensional space as a projection plane; distance detecting means for detecting distances between pixels in the projection plane and voxels in each of said plurality of second voxel data; surface image generating means for generating surface images of the second voxel data in accordance with the distances of the pixels obtained by said distance detecting means; second extracting means for extracting sectional data representing axial, coronal, sagittal images from the first voxel data stored in said memory means; volume multi-plane reconstruction image generating means for affine-transforming the sectional data extracted by said second extracting means and three-dimensionally combining the affine-transformed sectional data based on a view direction, thereby generating a volume multi-plane reconstruction image; and display means for displaying the surface images of the second voxel data and the volume multi-plane reconstruction image in a multi-frame manner.
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Specification