Neutron collimator

Patent 4463266 Issued on July 31, 1984. Estimated Expiration Date:

July 31, 2001. Estimated 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.

Abstract Claims Description Full Text

Patent References

1484663

1976179

2844736

3487218

3715597

3805081

Neutron therapy apparatus
Patent #: 3995163
Issued on: 11/30/1976
Inventor: Colditz

Variable neutron collimator Patent #: 4324979
Issued on: 04/13/1982
Inventor: Bewley , et al.

Inventor

Brahme, Anders

Assignee

Instrument AB Scanditronix (SE)

Application

No. 06/236199 filed on 02/20/1981

US Classes:

250/505.1, RADIATION CONTROLLING MEANS250/390.01, Neutron responsive means250/390.1, Including beam control378/150, Variable378/153, With pivotal leaf motion378/206With light projection

Examiners

Primary: Smith, Alfred E.
Assistant: Fields, Carolyn E.

Attorney, Agent or Firm

Eslinger; Lewis H.

International Classes

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

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.