X-ray or gamma ray systems or devices – Beam control – Scanner
Patent
1980-11-17
1982-12-28
Church, Craig E.
X-ray or gamma ray systems or devices
Beam control
Scanner
378150, G03B 4116
Patent
active
043665764
ABSTRACT:
Penetrating radiant energy imaging system employs a scanning pencil beam of radiant energy. In some embodiments of the invention, the cross-section of the beam varies in a controlled manner; in a disclosed embodiment the beam has either one or another cross-section. A detector responds to incident radiant energy passing through a target and provides signals to a processor which produces from the signals a pair of image arrays, each array consisting of signals generated by the scanning pencil beam of one cross-section or the other. Increased contrast and/or resolution is provided by selectively combining the signals in the image arrays. In other embodiments of the invention, specifically related to tomographic imaging, rather than controlling the cross-section of the radiant energy at the source, the cross-section of the radiant energy is controlled at the detector field. In these embodiments, the detector field is occupied by multiple detectors and one or more of the detectors has a field of view which is different from the field of view of other detectors.
REFERENCES:
patent: 4031401 (1977-06-01), Jacob
patent: 4260898 (1981-04-01), Annes
American Science and Engineering, Inc.
Church Craig E.
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