Acquisition and reconstruction of projection data using a stationary CT geometry
AssigneeGeneral Electric Company
InventorsJed Douglas Pack, Zhye Yin
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for acquiring and reconstructing projection data that is mathematically complete or sufficient using a computed tomography (CT) system having stationary distributed X-ray sources and detector arrays. In one embodiment, a non-sequential activation is employed to acquire mathematically complete or sufficient projection data. In another embodiment, a distributed source is provided as a generally semicircular segment. In such an embodiment, an alternating activation scheme may be employed to allow one or more helices of image data to be acquired.
Claims24
An imaging system comprising:
- at least one generally circular detector array comprising a plurality of detector elements configured to generate responsive signals corresponding to X-rays incident upon the detector array;
- a generally circular, semicircular, or arcuate source configured to emit X-rays from a plurality of addressable X-ray source locations, wherein the generally circular, semicircular or, arcuate source is disposed in a gap between adjacent generally circular detector arrays, or in a gap defined by at least a portion of said at least one generally circular detector array;
- and
- a controller that non-sequentially activates the plurality of addressable X-ray source locations.
An imaging system comprising:
- at least one generally circular detector array comprising a plurality of detector elements configured to generate responsive signals corresponding to X-rays incident upon the detector array;
- a generally circular, semicircular, or arcuate source configured to emit X-rays from a plurality of addressable X-ray source locations, wherein the generally circular, semicircular, or arcuate source is disposed in a gap between adjacent generally circular detector arrays, or in a gap defined by at least a portion of said at least one generally circular detector array;
- and
- a controller that activates the plurality of addressable X-ray source locations in an alternating pattern.
A method for acquiring one or more sets of imaging data, comprising:
- non-sequentially activating a plurality of addressable X-ray source locations of a generally circular or, semicircular or, arcuate source such that each X-ray source location causes emission of X-rays when activated, wherein the generally circular, semicircular or, arcuate source is disposed in a gap between adjacent generally circular detector arrays, or in a gap defined by at least a portion of said at least one generally circular detector array;
- and
- generating a respective signal at the detector array corresponding to each respective activation of an X-ray source location, wherein each respective signal corresponds to the X-rays incident on the detector array.
A method for acquiring one or more sets of imaging data, comprising:
- activating a plurality of addressable X-ray source locations of a generally circular or, semicircular or, arcuate source in an alternating pattern, wherein each X-ray source location causes emission of X-rays when activated and wherein the generally circular, semicircular or, arcuate source is disposed in a gap between adjacent generally circular detector arrays, or in a gap defined by at least a portion of said at least one generally circular detector array;
- and
- generating a respective signal at the detector array corresponding to each respective activation of an X-ray source location, wherein each respective signal corresponds to the X-rays incident on the detector array.
One or more tangible, machine-readable media, comprising code executable to perform the acts of:
- non-sequentially activating a plurality of addressable X-ray source locations of a generally circular, semicircular or, arcuate source such that each X-ray source location causes emission of X-rays when activated, wherein the generally circular, semicircular or, arcuate source is disposed in a gap between adjacent generally circular detector arrays, or in a gap defined by at least a portion of said at least one generally circular detector array;
- and
- generating a respective signal at a detector array corresponding to each respective activation of an X-ray source location, wherein each respective signal corresponds to the X-rays incident on the detector array.
One or more tangible, machine-readable media, comprising code executable to perform the acts of:
- activating a plurality of addressable X-ray source locations of a generally circular, semicircular or, arcuate source in an alternating pattern, wherein each X-ray source location causes emission of X-rays when activated and wherein the generally circular, semicircular or, arcuate source is disposed in a gap between adjacent generally circular detector arrays, or in a gap defined by at least a portion of said at least one generally circular detector array;
- and
- generating a respective signal at a detector array corresponding to each respective activation of an X-ray source location, wherein each respective signal corresponds to the X-rays incident on the detector array.
Dependencies are inferred from the claim text.