X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1991-12-09
1995-03-21
Dzierzynski, Paul M.
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378 95, 378901, H05G 138
Patent
active
054003830
ABSTRACT:
A fluoroscopic imager for observing a living creature with reduced x-ray dosage uses a video monitor for displaying frames of image samples received during respective ones of frame scan intervals that regularly and successively occur at a display frame rate sufficiently high that brightness flicker is acceptably low to a human observer; an x-ray source that can be gated on for intervals not as long as a display frame; and a fluoroscopic camera, including a raster-scanning video camera and x-ray-to-light conversion apparatus with persistence not appreciably longer than a display frame and frame-filling apparatus. Especially during purely diagnostic procedures, the frame-filling apparatus generates a continuous succession of frames of image samples at the display frame rate by interpolating between successively grabbed frames of image samples. During procedures in which interpolating between successively grabbed frames of image samples introduces unacceptable delay in the observed image, the frame-filling apparatus generates the continuous succession of frames of image samples by extrapolating from each most recently grabbed frame.
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Itch et al, "A Dose-Reducing TV Fluoroscopy System", Mar. 1973, pp. 19-24, Toshiba Review Int. Ed., Japan.
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Abdel-Malek Aiman A.
Bloomer John J.
Yassa Fathy F.
Bruce David V.
Dzierzynski Paul M.
General Electric Company
Mora Enrique J.
Webb II Paul R.
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