Multi-sector computed tomography image acquisition
First Claim
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1. A method for adaptively acquiring computed tomography scan data,comprising:
- acquiring heart cycle data for a patient undergoing imaging;
rotating an X-ray source about the patient;
activating the X-ray source during two or more heartbeats identified in the heart cycle data, wherein the X-ray source, when activated, emits an X-ray beam that generates projection data for an imaged volume about which the X-ray source is rotating, and wherein one or more of the activations of the X-ray source are adapted in terms of one or more of timing, duration or operating current based on data completeness;
combining the projection data acquired during the two or more heartbeats based on one or more consistency-based criteria to generate a substantially complete set of projection data; and
reconstructing the substantially complete set of projection data to generate one or more volumetric images at a cardiac phase of interest.
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Abstract
An approach is disclosed for acquiring multi-sector computed tomography scan data. The approach includes activating an X-ray source during heartbeats of a patient to acquire projection data over a limited angular range for each heartbeat. The projection data acquired over the different is combined. An image having good temporal resolution is reconstructed using the combined projection data.
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Citations
22 Claims
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1. A method for adaptively acquiring computed tomography scan data,
comprising: -
acquiring heart cycle data for a patient undergoing imaging; rotating an X-ray source about the patient; activating the X-ray source during two or more heartbeats identified in the heart cycle data, wherein the X-ray source, when activated, emits an X-ray beam that generates projection data for an imaged volume about which the X-ray source is rotating, and wherein one or more of the activations of the X-ray source are adapted in terms of one or more of timing, duration or operating current based on data completeness; combining the projection data acquired during the two or more heartbeats based on one or more consistency-based criteria to generate a substantially complete set of projection data; and reconstructing the substantially complete set of projection data to generate one or more volumetric images at a cardiac phase of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A computed tomography imaging system, comprising:
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an X-ray source configured to emit X-rays; a detector configured to generate data in response to the X-rays emitted by the X-ray source; a gantry upon which the X-ray source and detector rotate about an imaging volume; an X-ray controller configured to control activation of the X-ray source, wherein the X-ray controller receives as an input heart cycle data and activates the X-ray source during two or more heartbeats identified in the heart cycle data, wherein the X-ray source is adaptively activated over an angular range that is less than 180°
plus a fan angle of an emitted X-ray beam during at least activations of the X-ray source of the X-ray source subsequent to an initial activation of the X-ray source; anda processing component configured to reconstruct one or more images based on the projection data generated by the detector. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A non-transitory, computer-readable medium configured to store one or more routines executable by an imaging system, the routines, when executed, causing acts to be performed comprising:
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acquiring heart cycle data; rotating an X-ray source about an imaging volume; activating the X-ray source during two or more heartbeats identified in the heart cycle data, wherein the X-ray source, when activated, emits an X-ray beam that generates projection data for the imaged volume, and wherein one or more of the activations of the X-ray source are adapted in terms of one or more of timing, duration or operating current based on data completeness; combining the projection data acquired during the two or more heartbeats based on one or more consistency-based criteria; and reconstructing the combined projection data to generate one or more volumetric images. - View Dependent Claims (20, 21, 22)
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Specification