Computer-supported image reconstruction method for a three-dimensional subject
First Claim
Patent Images
1. A computer-supported method for reconstructing an image of a three-dimensional subject comprising the steps of:
- supplying at least three two-dimensional projections of a three-dimensional subject, onto a projection surface composed of surface elements, to an evaluation computer, said projections being offset from each other by difference angles in a rotational plane;
in said evaluation computer allocating to each of said surface elements a position designation designating a position of the surface element in the projection surface, and in each projection, a surface data value; and
in said evaluation computer, allocating binary volume data values, dependent on the respective position designations and surface data values of a plurality of said surface elements, for a plurality of volume elements having respective positions in space, for generating a three-dimensional image of said subject from a totality of said volume elements.
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Abstract
A computer is supplied with at least three 2-D projections of a subject that are offset from one another by difference angles. A position in the projection surface and a respective surface data value per projection are allocated to the respective surface elements of the projection surface. On the basis of the supplied projections, the computer determines binary volume data values for a number of volume elements, a position in space being allocated to the volume elements, so that their totality represents a 3-D image of the subject.
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Citations
45 Claims
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1. A computer-supported method for reconstructing an image of a three-dimensional subject comprising the steps of:
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supplying at least three two-dimensional projections of a three-dimensional subject, onto a projection surface composed of surface elements, to an evaluation computer, said projections being offset from each other by difference angles in a rotational plane;
in said evaluation computer allocating to each of said surface elements a position designation designating a position of the surface element in the projection surface, and in each projection, a surface data value; and
in said evaluation computer, allocating binary volume data values, dependent on the respective position designations and surface data values of a plurality of said surface elements, for a plurality of volume elements having respective positions in space, for generating a three-dimensional image of said subject from a totality of said volume elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A computer program product loadable into an evaluation computer for reconstructing an image of a three-dimensional subject, said evaluation computer being supplied with at least three two-dimensional projections of a three-dimensional subject, onto a projection surface composed of surface elements, said projections being offset from each other by difference angles in a rotational plane, said computer program product causing said evaluation computer to:
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allocate, to each of said surface elements, a position designation designating a position of the surface element in the projection surface, and in each projection, a surface data value; and
allocate binary volume data values, dependent on the respective position designations and surface data values of a plurality of said surface elements, for a plurality of volume elements having respective positions in space, and to generate a three-dimensional image of said subject from a totality of said volume elements. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A medical imaging system for reconstructing an image of a three-dimensional subject, comprising:
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a beam source having a focus from which penetrating radiation is emitted, and a radiation detector on which said radiation is incident after penetrating a three-dimensional subject, at least said focus being rotatable around said subject in a rotational plane to produce at least three two-dimensional projections of said three-dimensional subject, onto a projection surface of said radiation detector composed of surface elements, said projections being offset from each other by difference angles in said rotational plane; and
an evaluation computer supplied with said projections which allocates, to each of said surface elements, a position designation designating a position of the surface element in the projection surface, and in each projection, a surface data value, and which allocates, dependent on the respective position designations and surface data values of a plurality of said surface elements, binary volume data values for a plurality of volume elements having respective positions in space, and generates a three-dimensional image of said subject from a totality of said volume elements. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification