Process and apparatus for the treatment of lesions by high frequ

Details Process and apparatus for the treatment of lesions by high frequ Process and apparatus for the treatment of lesions by high frequ

1993-08-03

1995-09-05

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Absorption

378147, A61N 510

Patent

active

054486114

ABSTRACT:
Method and gamma ray collimator for the treatment of cerebral lesions by gamma irradiation. Gamma rays from a source radiate into an annular substantially divergent path made of radiation absorbing material. At the outlet of this divergent path, ribs further absorb unwanted parasitic oblique radiation. The annular beam of radiation thus formed enters an annular substantially convergent path to exit and to converge in an area to be treated. The annular beam of gamma rays that emerges through both divergent and convergent paths has a sufficient intensity to constitute a lethal dose within a defined volume and obviates the need for long term exposure to point beams of gamma radiation.

REFERENCES:
patent: 4780898 (1988-10-01), Sundqvist
patent: 4827491 (1989-05-01), Barish
patent: 5028789 (1991-07-01), Whittemore

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