Rotatable multi-element beam shaping device

Details Rotatable multi-element beam shaping device Rotatable multi-element beam shaping device

2006-05-30

2006-05-30

Schechter, Andrew (Department: 2871)

X-ray or gamma ray systems or devices

Beam control

Collimator

C378S153000, C378S147000, C378S150000

Reexamination Certificate

active

07054413

ABSTRACT:
A rotatable multi-element beam shaping device according to embodiments of the invention includes a first assembly, rotatable about a central axis through which a beam passes. The first assembly has a first and a second jaw adapted to move across the central axis to shape the beam. A second assembly, positioned below the first assembly, is also rotatable about the central axis, and has a third and a fourth jaw adapted to move across the central axis to further shape the beam. The first and the second assemblies, according to the invention, are separately controllable.

REFERENCES:
patent: 4868844 (1989-09-01), Nunan
patent: 5165106 (1992-11-01), Barthelmes et al.
patent: 5442675 (1995-08-01), Swerdloff et al.
patent: 5591983 (1997-01-01), Yao
patent: 5684854 (1997-11-01), Hughes
patent: 5748703 (1998-05-01), Cosman
patent: 6041101 (2000-03-01), Kooy et al.

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