Abstract
To the Editor: Computers used in diagnostic imaging, intensive care monitoring, and other such functions have been relatively immune to computer vandalism, because they have been special-purpose units that are not easily programmed by amateurs. A detailed MEDLINE search has revealed no previous reports of "infection," or sabotage, of medical diagnostic data with a computer "virus."Recently, our Department of Nuclear Medicine acquired new image-display stations for cardiac studies, consisting of powerful personal computers (PCs) (Macintosh II) that provide high-quality images for diagnosis. After successfully using the system for several weeks, we noted occasional random malfunctions. Often the computer had . . .

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