Single photon emission computed tomography system
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Accused Products
Abstract
A single photon emission computed tomography system includes a base for supporting a patient and a detector assembly adjacent the field of view. The detector assembly detects photon strikes from the field of view. A photon-blocking member is disposed between the field of view and the detector and has an aperture slot that allows passage of photons aligned with the slot. A collimating assembly includes a plurality of collimating vanes formed of photon-attenuating material. A support assembly supports the collimating assembly and includes a first support member and a second support member with the collimating assembly being disposed therebetween. An adjustment assembly includes a first adjuster operable to adjust a first distance between the collimating assembly and the first support member and a second adjuster operable to adjust a second distance between the collimating assembly and the second support member.
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Citations
81 Claims
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1-53. -53. (Canceled)
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54. A single photon emission computed tomography system for producing multiple tomographic images of the type representing a three-dimensional distribution of a photon-emitting radioisotope, the system comprising:
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a base including a patient support for supporting a patient such that a portion of the patient is located in a field of view, a longitudinal axis being defined through the field of view;
a detector assembly adjacent to the field of view, the detector assembly extending at least partially about the field of view between a first end and a second end, the first and second ends being spaced apart so as to define an entry opening to the field of view, the detector assembly being operable to detect if a photon strikes the detector assembly;
a collimating assembly including at least two spaced apart collimating vanes of photon-attenuating material, each of the vanes being disposed between the detector assembly and the field of view;
a generally arcuate photon-blocking member disposed between the field of view and the detector assembly, the blocking member having a plurality of aperture slots defined therethrough at intervals along the member for passage of photons aligned with the aperture slots, lines of response for the detector assembly being defined from the detector assembly through the aperture slots; and
a displacement actuator operable to move the photon-blocking member relative to the detector assembly such that the aperture slots are displaced relative to the detector assembly and the lines of response are swept across at least a portion of the field of view. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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67. A single photon emission computed tomography system for producing multiple tomographic images of the type representing a three-dimensional distribution of a photon-emitting radioisotope, the system comprising:
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a base including a patient support for supporting a patient such that a portion of the patient is located in a field of view, a longitudinal axis being defined through the field of view;
a detector assembly adjacent to the field of view, the detector assembly extending at least partially about the field of view between a first end and a second end, the first and second ends being spaced apart so as to define an entry opening to the field of view, the detector assembly being operable to detect if a photon strikes the detector assembly;
a collimating assembly including at least two spaced apart collimating vanes of photon-attenuating material, each of the vanes being disposed between the detector assembly and the field of view;
a generally arcuate photon-blocking member disposed between the field of view and the detector assembly, the blocking member having a plurality of aperture slots defined therethrough at intervals along the member for passage of photons aligned with the aperture slots, lines of response for the detector assembly being defined from the detector assembly through the aperture slots; and
a displacement actuator operable to move the detectors relative to the photon-blocking member such that the detector assembly is displaced relative to the aperture slots and the lines of response are swept across at least a portion of the field of view. - View Dependent Claims (68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79)
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80. A single photon emission computed tomography system for producing multiple tomographic images of the type representing a three-dimensional distribution of a photon-emitting radioisotope, the system comprising:
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a base including a patient support for supporting a patient such that a portion of the patient is located in a field of view, a longitudinal axis being defined through the field of view;
a detector assembly adjacent to the field of view, the detector assembly extending at least partially about the field of view between a first end and a second end, the first and second ends being spaced apart so as to define an entry opening to the field of view, the detector assembly being operable to detect if a photon strikes the detector assembly;
a collimating assembly including at least two spaced apart collimating vanes of photon-attenuating material, each of the vanes being disposed between the detector assembly and the field of view;
a photon-blocking member disposed between the field of view and the detector assembly, the blocking member having a plurality of aperture slots defined therethrough at intervals along the member for passage of photons aligned with the aperture slots, lines of response for the detector assembly being defined from the detector assembly through the aperture slots; and
a displacement actuator operable to move the photon-blocking member relative to the detector assembly such that the aperture slots are displaced relative to the detector assembly and the lines of response are swept across at least a portion of the field of view.
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81. A single photon emission computed tomography system for producing multiple tomographic images of the type representing a three-dimensional distribution of a photon-emitting radioisotope, the system comprising:
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a base including a patient support for supporting a patient such that a portion of the patient is located in a field of view, a longitudinal axis being defined through the field of view;
a detector assembly adjacent to the field of view, the detector assembly extending at least partially about the field of view between a first end and a second end, the first and second ends being spaced apart so as to define an entry opening to the field of view, the detector assembly being operable to detect if a photon strikes the detector assembly;
a collimating assembly including at least two spaced apart collimating vanes of photon-attenuating material, each of the vanes being disposed between the detector assembly and the field of view;
a photon-blocking member disposed between the field of view and the detector assembly, the blocking member having a plurality of aperture slots defined therethrough at intervals along the member for passage of photons aligned with the aperture slots, lines of response for the detector assembly being defined from the detector assembly through the aperture slots; and
a displacement actuator operable to move the detectors relative to the photon-blocking member such that the detector assembly is displaced relative to the aperture slots and the lines of response are swept across at least a portion of the field of view.
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Specification