Single photon emission computed tomography system
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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
55 Claims
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1-20. -20. (canceled)
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21. 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 human patient such that a portion of the patient'"'"'s torso is located in a field of view, a longitudinal axis being defined through the field of view;
a detector assembly adjacent the field of view, the detector assembly including a photon-responsive detector operable to detect if a photon strikes the detector, the detector assembly operable to scan for photons emitted from the portion of the patient'"'"'s torso located in the field of view; and
a collimating assembly including a plurality of collimating vanes formed of photon-attenuating material, the vanes being spaced apart so as to define a plurality of gaps, the gaps each having a height of at least 3 mm, the plurality of vanes being disposed between the detector and the field of view such that photons traveling from the field of view to the detector may pass through one of the gaps. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. 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 human patient such that a portion of the patient'"'"'s torso is located in a field of view, a longitudinal axis being defined through the field of view;
a detector assembly adjacent the field of view, the detector assembly including a photon-responsive detector operable to detect if a photon strikes the detector, the detector assembly operable to scan for photons emitted from the portion of the patient'"'"'s torso located in the field of view;
a photon-blocking member disposed between the field of view and the detector, the blocking member having an aperture slot defined therethrough for passage of photons aligned with the aperture slot, a line of response being defined from the detector through the aperture;
a collimating assembly including a plurality of collimating vanes formed of photon-attenuating material, the vanes being spaced apart so as to define a plurality of gaps, the gaps each having a height of at least 3 mm, the plurality of vanes being disposed between the detector and the field of view such that photons traveling from the field of view to the detector may pass through one of the gaps; and
a displacement actuator operable to move one of the detector and the photon-blocking member relative to the other of the detector and the photon-blocking member such that the aperture is displaced relative to the detector and the line of response is swept across at least a portion of the field of view. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification