Apparatus and method for therapeutically irradiating a chosen ar

Details Apparatus and method for therapeutically irradiating a chosen ar Apparatus and method for therapeutically irradiating a chosen ar

1989-02-09

1991-03-05

Howell, Janice A.

X-ray or gamma ray systems or devices

Specific application

Absorption

378 4, 378 64, 378147, 378150, 378151, 378152, A61B 100, G21K 102, G21K 104

Patent

active

049982680

ABSTRACT:
In combination with a diagnostic CT scanner using radiant energy for imaging, an apparatus for therapeutically irradiating a target, comprising a mask that partially attenuates the radiant energy passing therethrough, but transmits through an aperture sufficient radiant energy for imaging. The mask, intermediate the radiant energy source and the target, passes an unattenuated portion of the radiant energy to irradiate the target. The cross-sectional shape and spatial position of the mask aperture can be selectively varied. A post-mask is aligned with the mask aperture and attenuates the radiant energy passing therethrough to an energy level essentially uniform with that of the radiant energy passing through the mask to permit continued imaging during therapeutic irradiation of the target. A method of using the invention in combination with a diagnostic CT scanner using radiant energy for imaging is also provided.

REFERENCES:
patent: 4118631 (1978-10-01), Froggatt
patent: 4200799 (1980-04-01), Saito
patent: 4266139 (1981-03-01), Sportelli et al.
patent: 4365341 (1982-12-01), Lam
patent: 4598415 (1986-07-01), Luccio et al.
patent: 4766603 (1988-08-01), Okabe et al.

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