X-ray or gamma ray systems or devices – Beam control – Scanner
Patent
1982-01-26
1984-02-21
Church, Craig E.
X-ray or gamma ray systems or devices
Beam control
Scanner
378149, G03B 4116
Patent
active
044334273
ABSTRACT:
An image-reconstructive technique for examining a body by means of penetrating radiation, such as X-rays, is described in which a pre-body collimator having a two-dimensional array of radiation-transmitting holes each bordered by radiation non-transmitting walls is disposed between the body and the source of radiation, and a plurality of exposures are made onto a radiation-sensitive surface, in which the radiation is projected through the collimator while the radiation source is at a plurality of different locations, such that during the successive exposures, the radiation from the source passes through different ray paths defined by the holes in the pre-body collimator. The radiation level received by each of the radiation-sensitive surface elements is detected, stored, and processed to reconstruct the two-dimensional radiation pattern but with enhanced resolution. Preferably a post-body collimator is also used to suppress scattering. Described are a four-exposure procedure and a nine-exposure procedure.
REFERENCES:
patent: 2730566 (1956-01-01), Bartow
patent: 4114041 (1978-09-01), Oliver
patent: 4188541 (1980-02-01), Hounsfield
patent: 4234794 (1980-11-01), Voinea
patent: 4366574 (1982-12-01), Hill
Church Craig E.
Elscint Inc.
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