Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1994-12-15
1997-01-07
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036304, 25036305, G01T 1166
Patent
active
055919774
ABSTRACT:
An imaging device includes a means for defining an imaging target space and at least two scintillation cameras which are positioned on opposite sides of the imaging target space so as to define one or more matched pairs of scintillation cameras. Each of the scintillation cameras includes a scintillation crystal. Means are provided for tilting the scintillation cameras of the one or more matched pairs of scintillation cameras and their respective scintillation crystals, so as to maximize coincidence detection sensitivity by adjusting an axial field of view to match an axial extent of a target located in the imaging target space. Means for processing signals generated by the scintillation cameras are also provided. Each pair of cameras is configured to detect paired gamma rays, emitted simultaneously and in opposite directions from a point of annihilation of a positron in the target within the target space, to thereby define endpoints of a coincidence line passing through the target and connecting the pair of cameras. Each pair of cameras generates electrical signals, responsive to substantially simultaneous absorption of each of the paired gamma rays by a respective one of the pair of cameras, indicative of the paired gamma rays emanating from a single positron annihilation in the target.
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Gandler William R.
Green Michael V.
Seidel Jurgen
Fields Carolyn E.
The United States of America as represented by the Secretary of
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