X-ray or gamma ray systems or devices – Beam control – Scanner
Patent
1989-10-05
1991-02-26
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Beam control
Scanner
378145, 378149, G21K 510
Patent
active
049967010
ABSTRACT:
In a method for slit radiography a fan-shaped X-ray beam scans a body to form an X-ray shadow image. The fan-shaped beam is formed by a number of sectors situated next to each other. For each sector the transmitted X-ray radiation is controlled instantaneously during a scan by means of controllable beam sector modulators. The X-ray radiation is cyclically modulated in a predetermined manner for all the sectors taken together. The controllable beam sector modulators are individually controlled to select cyclically and in synchronism with the predetermined cyclic modulation a part of the X-ray radiation for each sector.
REFERENCES:
patent: 4675893 (1987-06-01), Duinker et al.
patent: 4679221 (1987-07-01), O'Brien et al.
patent: 4916723 (1990-04-01), Geluk
B. V. Optische Industrie "De Oude Delft"
Fields Carolyn E.
Marn Louis E.
Porta David P.
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