Gamma camera system with composite solid state detector
First Claim
1. A composite solid state detector for use in deriving a display, by spatial coordinate information, of the distribution or radiation emanating from a source thereof situate within a region of interest, comprising:
- a plurality of solid state detector components, each having a given surface arranged for exposure to impinging radiation and exhibiting discrete interactions therewith at given spatially definable locations;
said given surface of each said detector component and the surface disposed opposite and substantially parallel thereto, respectively, being associated with impedance means configured to provide, for each of said opposed surfaces, outputs for impedance defined signals relating the said given location of said interactions with one spatial coordinate parameter of one select directional sense;
said detector components being arranged to provide groupings of adjacently disposed ones of said given surfaces mutually linearly oriented to exhibit a common said directional sense of said spatial coordinate parameter; and
means interconnecting at least two of said outputs associated with each of said surfaces within a given said grouping thereof for collecting said impedance defined signals deriving therefrom.
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Abstract
A composite solid-state detector for utilization within gamma cameras and the like. The detector'"'"'s formed of an array of detector crystals, the opposed surfaces of each of which are formed incorporating an impedance-derived configuration for determining one coordinate of the location of discrete impinging photons upon the detector. A combined read-out for all detectors within the composite array thereof is achieved through a row and column interconnection of the impedance configurations. Utilizing the noted read-outs for respective sides of the discrete crystals, a resultant time-constant characteristic for the composite detector crystal array remains essentially that of individual crystal detectors.
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Citations
22 Claims
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1. A composite solid state detector for use in deriving a display, by spatial coordinate information, of the distribution or radiation emanating from a source thereof situate within a region of interest, comprising:
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a plurality of solid state detector components, each having a given surface arranged for exposure to impinging radiation and exhibiting discrete interactions therewith at given spatially definable locations; said given surface of each said detector component and the surface disposed opposite and substantially parallel thereto, respectively, being associated with impedance means configured to provide, for each of said opposed surfaces, outputs for impedance defined signals relating the said given location of said interactions with one spatial coordinate parameter of one select directional sense; said detector components being arranged to provide groupings of adjacently disposed ones of said given surfaces mutually linearly oriented to exhibit a common said directional sense of said spatial coordinate parameter; and means interconnecting at least two of said outputs associated with each of said surfaces within a given said grouping thereof for collecting said impedance defined signals deriving therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A camera system for imaging the distribution of a source of gamma radiation situate within a region of interest, comprising:
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a housing positionable a select distance from said region of interest at a location for receiving said radiation; means collimating said received radiation; a composite, solid state detector mounted within said housing in an orientation for receiving said collimated radiation, said detector including; an array of solid state detector components, having given surfaces arranged in mutual, close adjacency to define a composite detector radiation acceptance plane exposable to incoming collimated radiation, said detector components exhibiting discrete interactions, at given spatial locations, with radiation impinging thereupon at said acceptance plane, said given surface of each said detector component and the surface thereof disposed opposite thereto, respectively, being operationally associated with impedance means, said impedance means being configured in correspondence with the extent of an associated said detector component surface and having outputs situate at two opposed peripheries of said associated surface for providing signals relating the location of a said interaction within said component to the respective locations of said outputs; said detector components being arranged within said array to define spatially aligned discrete rows and orthogonally disposed columns of said surfaces and the said impedance means outputs associated therewith; means interconnecting said impedance means outputs within each said discrete row in parallel circuit relationship to provide a signal collection output, means interconneting said impedance means outputs within each said discrete column in parallel circuit relationship to provide a column signal collection output; and means responsive to signals received from said row signal collection outputs and said column signal collection outputs for deriving an image corresponding with said interactions. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification