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Title:
Compact X-ray collimator
Abstract:
An X-ray collimator comprising an X-ray shielded enclosure having aligned entrance and exit apertures for permitting passage of an X-ray beam, the exit aperture having a generally rectangular configuration defined by edges of two orthogonally disposed pairs of opposing rotatable exit shutter elements. Each of the exit shutter elements has a generally semi-cylindrical configuration and is concentrically disposed about a respective axis of rotation. Each pair of semi-cylindrical exit shutter elements is mounted for opposing rotatable movement within the other pair of semi-cylindrical exit shutter elements. The entrace aperture of the housing may be defined by two orthogonally disposed pairs of opposing shutter plates, one pair thereof being directly linked to an associated pair of semi-cylindrical exit shutter elements for corresponding movement therewith.
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Inventors:
Cutter, James W. (Hollister, CA)
Application Number:
06/161108
Filing Date: 1980-06-19 Publication_date: 1983-04-19 Assignee:
MACHLETT LAB INC
Primary Class(es):
378/153
976/DIG.430
Other Classes:
A61B6/06; G21K1/04; G21K1/02; A61B6/06
US Patent Ref:
| 2332339 | October, 1943 | Pratt | 49/324 | Valance or the like | | 2542196 | February, 1951 | Haupt | 250/511 | X-ray apparatus | | 3452964 | July, 1969 | Bibeault | 49/324 | PORTABLE LIFTING AND/OR SPRING WINDING DEVICE | | 3829701 | August, 1974 | Hura | RADIATION COLLIMATOR | | | 3936647 | February, 1976 | Fekete | 250/511 | X-ray collimator for controlling the emission of secondary radiation | | 3947690 | March, 1976 | Peyser | Radiation limiting means | | | 4128767 | December, 1978 | Stodberg | 250/513 | X-ray primary radiation diaphragm assembly | | 4246488 | January, 1981 | Hura | 250/511 | Radiation collimator |
Other Refs:
Other References:
James et al., Mathematics Dictionary, Digest Press, Van Nuys Calif., 1946, pp. 62-63.
Primary Examiner:
Smith, Alfred E.
Assistant Examiner:
Grigsby; T. N.
Attorney:
Meaney, John T.
Pannone, Joseph D.
Sharkansky, Richard M.
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