Abstract
A minicomputer based digital processing system has been assembled for the on-line analysis of ultrasonic signals from a standard B-scanner in daily clinical use. The radio-frequency signals from the transducer are digitized to a precision of eight bits at a rate of 20 MHz/word and the data is stored in raw form on floppy disks. The system has been applied to the study of alcohol induced diffuse liver disease using a combination of simple statistical and texture analyses on the recorded signals. The accuracy of these analyses in the detection of such disease has been found to be substantially higher than that achieved by experienced observers using grey-scale B-scans. Additionally, pattern recognition procedures using the parameters of echo amplitude and texture have been designed in an attempt to classify the state of disease present. This has met encouraging success particularly for patients with alcoholic hepatitis and cirrhosis.
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