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Proceedings Paper

Investigation Of A Video Frame Averaging Digital Subtraction Fluoroscopic System
Author(s): Robert G. Gould; Martin J. Lipton; Paul Mengers; Roger Dahlberg
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Paper Abstract

A digital subtraction fluoroscopic (DSF) system with two video processors in series has been analyzed and evaluated clinically. In this system the initial processor operates simultaneously in an averaging and differencing mode, resulting in an output that is the difference between the most recent input video frame and an exponentially weighted average of preceeding frames. The content in this processor's memory (the mask image) is continually upgraded by each incoming frame or, alternatively, frozen in time by the operator. The second processor averages the difference image output from the first unit. A continuous, real-time, noise reduced subtraction sequence is viewed on a monitor and stored on an analog disc recorder. A video tape recorder preserves raw data and permits retrospective viewing of an injection sequence using different processor settings.

Paper Details

Date Published: 4 November 1981
PDF: 7 pages
Proc. SPIE 0314, Digital Radiography, (4 November 1981); doi: 10.1117/12.933044
Show Author Affiliations
Robert G. Gould, University of California (United States)
Martin J. Lipton, University of California (United States)
Paul Mengers, University of California (United States)
Roger Dahlberg, University of California (United States)

Published in SPIE Proceedings Vol. 0314:
Digital Radiography
William R. Brody M.D., Editor(s)

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