Radiant energy – Radiation controlling means
Patent
1981-02-20
1984-07-31
Smith, Alfred E.
Radiant energy
Radiation controlling means
378150, 378153, 378206, G21K 104
Patent
active
044632665
ABSTRACT:
A neutron collimator with an adjustable irradiation field for an effective neutron radiation source includes a protective radiation casing; a frame surrounded by the casing; a plurality of individual carrier arms mounted on the frame; a plurality of pairs of opposite elongated wedge-shaped slabs arranged side by side such that respective ones of the opposite wedge-shaped slabs form a fan-shaped configuration which converges toward an apex at the neutron radiation source, each wedge-shaped slab being mounted for rotational and translational movement on a respective carrier arm such that the wedge-shaped slabs of each pair are mounted for motion towards and away from each other along a path which intersects the irradiation field for the neutron radiation source and such that the inner side surface of each wedge-shaped slab is always directed generally towards the neutron radiation source; and at least one bearing provided between each wedge-shaped slab and the respective carrier arm on which it is movably mounted.
REFERENCES:
patent: 1484663 (1924-02-01), Mutscheller
patent: 1976179 (1934-10-01), Mannl
patent: 2844736 (1958-07-01), Johns et al.
patent: 3487218 (1969-12-01), Krebs et al.
patent: 3715597 (1973-02-01), Hofmann et al.
patent: 3805081 (1974-04-01), Barthel et al.
patent: 3995163 (1970-11-01), Colditz
patent: 4324979 (1982-04-01), Bowley et al.
Barnes et al., "The Scanning Grid: A Novel and Effective Bucky Movement", Radiology, 135, Jun. 1980, pp. 765-767.
Eslinger Lewis H.
Fields Carolyn E.
Instrument AB Scanditronix
Smith Alfred E.
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