04229764 is referenced by 15 patents and cites 9 patents.

Disclosed is a visibility expander of relatively simple and inexpensive construction for use in reading X-ray photographs. It comprises a TV picture tube and monitor coupled, together via a low pass filter and window amplifier in series as stated. Both the expansion factor and the midpoint of the window(amplifier transfer characteristics are continuously variable so that the operator may better detect changes to picture contrasts. It may be used by doctors, X-ray technicians, investigative agencies and others who need a simple and inexpensive device for analyzing X-ray photographs.

Title
Visibility expander
Application Number
751680
Publication Number
4229764
Application Date
July 3, 1978
Publication Date
October 21, 1980
Inventor
Michael Danos
407 Muddy Branch Rd., Gaithersburg, 20760
MD, US
Agent
Howard L Rose
IPC
H04N 7/18
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