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US Patent 4739173 - Collimator apparatus and method

US Patent Issued on April 19, 1988
Estimated Patent Expiration Date: Icon_subject August 15, 2006Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

A collimator apparatus (10 or 100) including one or more bundles of nested rods (11, 11a or 101 or 101a or 201) which define a surface (112, 112a) which interferes with a beam of radiation is described. The apparatus particularly uses coil spring (48) between and along the axis (a--a or c--c) of the rods which are compressed by blocks (13, 14, 13a and 14a or 103, 104, 103a and 104a) to lock the rods in position in holes in the blocks. The apparatus is particularly useful for shaping radiation beams for patient treatment.

Inventors

Application

No. 06/896730 filed on 08/15/1986

US Classes:

250/505.1, RADIATION CONTROLLING MEANS378/152With linear leaf motion

Field of Search

250/505.1RADIATION CONTROLLING MEANS

Examiners

Primary: Anderson, Bruce C.

Attorney, Agent or Firm

US Patent References

1909118, 3543384, 4053808, Electron beam collimator
Issued on: 10/11/1977
Inventor: Peacock
4158779, X-ray shield
Issued on: 06/19/1979
Inventor: Rommel ,   et al.
4463266, Neutron collimator
Issued on: 07/31/1984
Inventor: Brahme
4534052Block for partially limiting a radiation beam, and a collimator comprising such blocks
Issued on: 08/06/1985
Inventor: Milcamps

International Classes

G21K 1/02 (20060101)
A61N 5/10 (20060101)
G21K 1/04 (20060101)

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