Apparatus and method for reducing X-ray dosage during a fluorosc

Details Apparatus and method for reducing X-ray dosage during a fluorosc Apparatus and method for reducing X-ray dosage during a fluorosc

1992-06-29

1994-01-11

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Filter

378 99, G21K 300

Patent

active

052788873

ABSTRACT:
The present invention is an apparatus and method for reducing the dosage of X-rays during a fluoroscopic procedure wherein a filter member is used to selectively attenuate the X-ray radiation striking a patient's body. The filter member allows unattenuated X-rays to image an area of interest selected by a physician, thus producing a high intensity, low noise image. However, the areas surrounding the area of interest are imaged with attenuated radiation producing a less intense, more noisy image. A real-time image processing system is used to compensate the image brightness and to potentially filter the compensated region so as to reduce noise. Image quality is thus restored so that a physician can orient the location of a procedure, within a patient's body, and have perspective to the position of area of interest relative to its surroundings.

REFERENCES:
patent: 3717768 (1973-02-01), Edholm et al.
patent: 3917954 (1975-11-01), Boge
patent: 4641336 (1987-02-01), Gastrin
patent: 4941169 (1990-07-01), Kawai et al.

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