Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1992-06-17
1994-06-28
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036303, 250369, 36441319, 36441321, G06F 1542, G01T 1166
Patent
active
053249461
ABSTRACT:
In a nuclear medical examination apparatus such as a SPECT (single photon emission computed tomography) image gamma camera, resolution of SPECT images is improved. A nuclear medical examination apparatus includes a detector unit for detecting in a fan-beam form, .gamma.(gamma) rays emitted from a radioisotope injected into a biological body under medical examination to thereby produce .gamma.-ray projection data on the biological body; a scanning unit for relatively rotating both the detector unit and the biological body with respect to a center of rotation so as to obtain .gamma.-ray projection data at predetermined angular directions along the circumference of the biological body; a reconstruction unit for convoluting the projection data obtained from the detecting unit through the scanning unit, and for back-projecting the convoluted projection data only to a specific region of an entire reconstructing region, the above-described specific region being located near the detecting unit, whereby a distribution image of the radioisotope is reconstructed along a sectional plane of the biological body; and a display unit for displaying thereon the distribution image of the radioisotope reconstructed by the reconstructing unit.
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Ichihara Takashi
Nambu Kyojiro
Glick Edward J.
Hannaher Constantine
Kabushiki Kaisha Toshiba
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