Gamma camera system

Details Gamma camera system Gamma camera system

1997-05-16

2000-03-28

Westin, Edward P.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

25036305, 25036309, G01T 1161

Patent

active

060434945

ABSTRACT:
A gamma camera system of the present invention comprises a main detector for detecting gamma rays emitted from RIs provided to a subject, an emitter for emitting the gamma rays to the subject, and a sub-detector for detecting the gamma rays emitted from the emitter and transmitted through the subject. The sub-detector has at least one semiconductor element for directly detecting the gamma ray having high energy resolution. Based on the output of the sub-detector, an absorption ratio showing to what degree the gamma rays are absorbed in the subject is calculated. The absorption ratios are used to correct the number of the gamma rays counted based on the output of the main detector. Based on the corrected count values, RIs distribution is reconstructed. Thus, since the sub-detector having high energy resolution and the emitter other than the main detector are provided, the absorption ratios having high accuracy can be measured in parallel with imaging.

REFERENCES:
patent: 3852601 (1974-12-01), Casale
patent: 5155365 (1992-10-01), Cann et al.
patent: 5552605 (1996-09-01), Arata
patent: 5596197 (1997-01-01), Jones et al.

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