Abstract

Scan converters enable high-resolution grey-scale pictures to be obtained in ultrasonic examinations; the devices record in a non-integrating manner with only the peak value of an echo amplitude being recorded for any location, unlike storage oscilloscopes or short persistence oscilloscopes used with film. The ultrasound image information is converted to a 625-line television format, enabling standard monitors to be used for display and photographic recording; storage on video disc or videotape is also possible. The video disc allows the storage of a number of scans from a patient and thus assists in the selection of the most informative images for photography.

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