Multi-cycle dynamic CT imaging
First Claim
1. A dynamic CT imaging method comprising:
- capturing projection measurement data for a region of an examination object to be imaged, with simultaneous correlated capture of dynamic movement of the examination object;
selecting a time segment of the dynamic movement, for which image data is to be reconstructed;
determining time segment projection measurement data assigned to the selected time segment;
multiple reconstructing transition regions of subregions of the region to be imaged between successive cycles of the dynamic movement based on candidate projection measurement data sets that are part of the time segment projection measurement data;
determining the candidate projection measurement data sets, which correspond to an optimum reconstruction, as target projection measurement data; and
performing a standard reconstruction using the target projection measurement data for each of the successive cycles.
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Accused Products
Abstract
A dynamic CT imaging method is provided. With the method, projection measurement data for a region of an examination object to be imaged is captured, with simultaneous correlated capture of the respiratory movement of the examination object. A phase of the respiratory movement, for which image data is to be reconstructed, is selected. Phase projection measurement data assigned to the selected phase is also determined. Transition regions of partial images of the region to be imaged between successive respiratory cycles are then reconstructed on a trial basis based on a part of the phase projection measurement data, and a standard reconstruction is performed using parts of the phase projection measurement data for each of the successive respiratory cycles assigned to an optimum reconstruction.
18 Citations
15 Claims
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1. A dynamic CT imaging method comprising:
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capturing projection measurement data for a region of an examination object to be imaged, with simultaneous correlated capture of dynamic movement of the examination object; selecting a time segment of the dynamic movement, for which image data is to be reconstructed; determining time segment projection measurement data assigned to the selected time segment; multiple reconstructing transition regions of subregions of the region to be imaged between successive cycles of the dynamic movement based on candidate projection measurement data sets that are part of the time segment projection measurement data; determining the candidate projection measurement data sets, which correspond to an optimum reconstruction, as target projection measurement data; and performing a standard reconstruction using the target projection measurement data for each of the successive cycles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An image data reconstruction device comprising:
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an input interface configured to capture projection measurement data for a region of an examination object to be imaged, with simultaneous correlated capture of movement of the examination object; a processor configured to; capture selection information relating to a selected time segment of the movement, for which image data is to be reconstructed; determine the projection measurement data assigned to the selected time segment; multiple reconstruct of transition regions of subregions of the region to be imaged between successive cycles based on candidate projection measurement data sets of a part of the time segment projection measurement data; determine the candidate projection measurement data sets, which correspond to an optimum reconstruction, as target projection measurement data; and perform a standard reconstruction using the target projection measurement data for each of the successive cycles.
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14. A computed tomography system comprising:
a control system comprising; an image data reconstruction device comprising; an input interface configured to capture projection measurement data for a region of an examination object to be imaged, with simultaneous correlated capture of movement of the examination object; a processor configured to; capture selection information relating to a selected time segment of the movement, for which image data is to be reconstructed; determine the projection measurement data assigned to the selected time segment; multiple reconstruct of transition regions of subregions of the region to be imaged between successive cycles based on candidate projection measurement data sets of a part of the time segment projection measurement data; determine the candidate projection measurement data sets, which correspond to an optimum reconstruction, as target projection measurement data; and perform a standard reconstruction using the target projection measurement data for each of the successive cycles.
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15. In a non-transitory computer-readable storage medium storing instructions executable by a computer for dynamic CT imaging, the instructions comprising:
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capturing projection measurement data for a region of an examination object to be imaged, with simultaneous correlated capture of movement of the examination object; selecting a time segment of the movement, for which image data is to be reconstructed; determining time segment projection measurement data assigned to the selected time segment; multiple reconstructing transition regions of subregions of the region to be imaged between successive cycles of the movement based on candidate projection measurement data sets that are part of the time segment projection measurement data; determining the candidate projection measurement data sets, which correspond to an optimum reconstruction, as target projection measurement data; and performing a standard reconstruction using the target projection measurement data for each of the successive cycles.
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Specification