Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1991-06-10
1993-05-11
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
G01T 1166
Patent
active
052104214
ABSTRACT:
A SPECT system includes three gamma camera heads (22a), (22b), (22c) which are mounted to a gantry (20) for rotation about a subject (12). The subject is injected with a source of emission radiation, which emission radiation is received by the camera heads. A reconstruction processor (112) reconstructs the emission projection data into a distribution of emission radiation sources in the subject. Transmission radiation from a radiation source (30) passes through the subject and is received by one of the camera heads (22a) concurrently with the emission radiation. The transmission radiation data is reconstructed into a three-dimensional CT type image representation of radiation attenuation characteristics of each pixel of the subject. An attenuation correction processor (118) corrects the emission projection data to compensate for attenuation along the path or ray that it traversed. In this manner, an attenuation corrected distribution of emission sources is generated.
REFERENCES:
patent: 4670657 (1987-06-01), Hawman et al.
patent: 5055687 (1991-10-01), Ichihara
Christian Paul E.
Gullberg Grant T.
Morgan Hugh T.
Tung Chi-Hua
Zeng Gengsheng L.
Hannaher Constantine
Picker International Inc.
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