Gated cone-beam computed tomography reconstruction with motion compensation
AssigneeKoninklijke Philips Electronics N.V.
InventorsRobert Manzke, Thomas Koehler, Michael Grass, Babak Movassaghi
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Abstract
E.g. in cardiac cone-beam CT, the source path is interrupted due to the fact that the projection data is gated. According to the present invention, a method is provided to obtain projection data corresponding to an uninterrupted source trajectory from such a gated data set. For this purpose, a motion compensation is applied. Advantageously, a complete data set may be determined allowing for an approximate or an exact reconstruction method to be applied to the completed data set without interruption of the image generation.
Claims9
Method of reconstructing projection data from a gated projection data set, the method comprising the steps of:
- acquiring the gated projection data set;
- wherein source trajectory used for acquiring the gated projection data set has at least one gap due to gating;
- determining new projection data corresponding to the at least one gap;
- and supplementing the gated projection data with the new projection data to compensate for the at least one gap in the source trajectory.
Image processing device, comprising:
- a memory for storing a gated projection data set;
- and a processor for reconstructing projection data from a gated projection data set, wherein the processor is adapted to perform the following operation:
- acquiring the gated projection data set from the memory;
- wherein source trajectory used for acquiring the gated projection data set has at least one gap due to gating;
- determining new projection data corresponding to the at least one gap;
- and supplementing the gated projection data with the new projection data to compensate for the at least one gap in the source trajectory.
Computed tomography apparatus, comprising:
- a memory for storing a gated projection data set;
- and a processor for reconstructing projection data from a gated projection data set, wherein the processor is adapted to perform the following operation:
- acquiring the gated projection data set from the memory;
- wherein source trajectory used for acquiring the gated projection data set has at least one gap due to gating;
- determining new projection data corresponding to the at least one gap;
- and supplementing the gated projection data with the new projection data to compensate for the at least one gap in the source trajectory.
A computer program for reconstructing projection data from a gated projection data set, wherein the computer program causes a computer to perform the following operation when the computer program is executed on the computer:
- acquiring the gated projection data set;
- wherein source trajectory used for acquiring the gated projection data set has at least one gap due to gating;
- determining new projection data corresponding to the at least one gap;
- and supplementing the gated projection data with the new projection data to compensate for the at least one gap in the source trajectory.
Dependencies are inferred from the claim text.