Adjustable-focal-length collimators method and system
First Claim
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1. An imaging system, comprising:
- a collimator assembly having a plurality of apertures therein; and
a detector assembly configured to generate one or more signals in response to gamma rays that pass through the one or more apertures;
wherein the imaging system is configured so that two or more of the plurality of the apertures have an independently adjustable focal length.
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Abstract
Embodiments relate to an imaging system that includes a collimator assembly having one or more pinhole apertures therein. The imaging system is configured so that one or more of the pinhole apertures has an adjustable focal length. The imaging system further includes a detector assembly configured to generate one or more signals in response to gamma rays that pass through the one or more pinhole apertures. Embodiments also relate to methods of changing collimator performance and methods of imaging a volume.
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Citations
26 Claims
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1. An imaging system, comprising:
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a collimator assembly having a plurality of apertures therein; and a detector assembly configured to generate one or more signals in response to gamma rays that pass through the one or more apertures; wherein the imaging system is configured so that two or more of the plurality of the apertures have an independently adjustable focal length. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An imaging system, comprising:
a plurality of pinhole-detector modules arranged about a volume, each pinhole-detector module comprising; a collimator having one or more pinhole apertures therein, wherein two or more of the pinhole-detector modules are configured so that at least one of the one or more pinhole apertures therein has an independently adjustable focal length; and a detector assembly configured to generate one or more signals in response to gamma rays that pass through the one or more pinhole apertures. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of changing collimator performance, comprising:
independently adjusting focal lengths between a detector assembly and a plurality of pinhole apertures in a collimator assembly. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method of imaging a volume, comprising:
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positioning at least a portion of a subject in a field of view of a single photon emission computed tomography system; collimating gamma rays emitted from the subject using a plurality of pinhole-detector modules, each pinhole-detector module comprising a collimator having one or more pinhole apertures and a detector assembly; detecting gamma rays that pass through the one or more pinhole apertures with the corresponding detector assembly; generating one or more signals in response to the detected gamma rays; and independently adjusting a focal length for two or more of the pinhole-detector modules based on the one or more generated signals. - View Dependent Claims (24, 25, 26)
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Specification