X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1997-05-15
1999-10-12
Church, Craig E.
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378 9812, H05G 164
Patent
active
059664240
ABSTRACT:
A method of obtaining high resolution, spatial images from a flat-panel imager is provided, in which a radiation opaque filter is provided over the flat-panel imager, interposed between the x-ray source and the patient tissue. The filter, comprised of x-ray and similar high energy radiation opaque material, is provided with an array of apertures in exact alignment with each pixel of the flat-panel imager. Each aperture has a diameter of about one-half a pixel. An initial image is taken, and then the filter and imager are moved, synchronously, to obtain three additional images, each motion repositioning the filter and imager, synchronously, a distance of one-half of one pixel. This results in four discontiguous x-ray exposures, which can be interpolated, preferably by computer algorithm, into a continuous, high resolution image. Although four exposures are needed, because of the presence of the filter, the patient dose remains the same as if only one exposure is made.
REFERENCES:
patent: 5648997 (1997-07-01), Chao
Church Craig E.
The University of Virginia Patent Foundation
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