Collimator

Details Collimator Collimator

2007-12-07

2010-11-02

Song, Hoon (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Absorption

C378S152000

Reexamination Certificate

active

07826593

ABSTRACT:
A collimator (1) primarily adapted for usage in a narrow scanned pencil beam radiation therapy system (100) includes adjacent pairs (5) of collimator leaves (10, 20). An inner portion (12) of a collimator leaf (10) facing the opposite leaf (20) of a pair (5) is made of a first material having high linear radiation attenuation. The remaining, major portion (14) of the leaf (10) is made of a second material having a comparatively low density, weight and radiation attenuation. The collimator (1) provides effective penumbra trimming of a radiation beam (60), while simultaneously protecting healthy tissue around a tumor in an irradiated patient (80) from the radiation. The new design results in a significantly more compact, lighter and less expensive collimator (1) as compared to traditional collimators.

REFERENCES:
patent: 6730924 (2004-05-01), Pastyr
patent: 2004/0213381 (2004-10-01), Harada
patent: 2403884 (2005-01-01), None
patent: 03079373 (2003-09-01), None
International Search Report dated Apr. 17, 2008.

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