Stereographic X-ray examination system including graphic screen means for generating index marks to locate corresponding regions in different X-rays
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United States of America Patent
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Sep 14, 1993
Grant Date -
N/A
app pub date -
Mar 23, 1990
filing date -
Mar 29, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A light box for X-rays is made by using a graphics screen (20) coupled to a microprocessor (23), with the screen being used with inverse brightness. Under these conditions, the graphics screen emits light at nearly all points, other than special locations (I.sup.25) whose positions can be controlled by means of a control box (24). An X-ray negative (6) to be examined is placed over the graphics screen. The control box is used to move the non-illuminated regions of the screen to point to special locations in the negative. The light box is particularly applicable t studying stereographic negatives for mammography. It makes it possible to determine more quickly and more accurately the locations of lesions in breasts under examination.
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