Leaf, multi-leaf collimator, device for delimiting beams and...

X-ray or gamma ray systems or devices – Beam control – Collimator

Reexamination Certificate

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Details

C378S150000, C250S505100

Reexamination Certificate

active

10507508

ABSTRACT:
The invention relates to a leaf (1) for a multi-leaf collimator (2) for delimiting a high-energy beam (3, 3′, 3″) of an irradiation device, in particular for conformational radiation therapy. According to the invention, the multi-leaf collimator (2) comprises a plurality of opposing leaves (1), which can be brought into the beam path (3, 3′, 3″) by means of drives (4), in such a way that the contour (5) of said path can be shaped in accordance with the volume to be irradiated. The need for beam-absorbent material (7) is reduced, as the leaf (1) essentially only comprises a beam-absorbent material (7) of an appropriate thickness (8) in a region (6) that is brought into the path (3, 3′, 3″) of the high-energy beam (3) during the course of all possible positional displacements (9). The invention also relates to a corresponding multi-leaf collimator (2), a device (22) for delimiting beams, and an irradiation device.

REFERENCES:
patent: 3448270 (1969-06-01), Peyser
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patent: 4794629 (1988-12-01), Pastyr et al.
patent: 5012506 (1991-04-01), Span et al.
patent: 5889834 (1999-03-01), Vilsmeier et al.
patent: 6335961 (2002-01-01), Wofford et al.
patent: 6730924 (2004-05-01), Pastyr et al.
patent: 2001/0043669 (2001-11-01), Ein-Gal
patent: 199 05 823 (2000-06-01), None
patent: 0 193 509 (1986-09-01), None
patent: 0 251 407 (1988-01-01), None

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