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English-born physicist John Wild (1914â2009) first used ultrasound to assess the thickness of bowel tissue as early as 1949; he has been described as the father of medical ultrasound. Subsequent advances in the field took place concurrently in several countries.
The transducer sends and receives sound waves through the body, then converts the waves into images on a monitor. Normal and abnormal tissues and organs contain different acoustic properties which are recorded by the sound waves during an ultrasound. For example, an ultrasound would be able to show the presence of a gallstone or cyst, as well as the swelling of the liver. An abdominal ultrasound can be used to evaluate the gallbladder, liver, bile ducts, pancreas, spleen, and kidneys.