The following preps are for outpatient care only. For questions about any of these preps, please contact the Radiology Reception Desk, at 6-4500 for more information. US works by using a transducer that produces and receives silent, high frequency sound waves. The transducer is usually a hand held instrument which is placed against the body and slowly passed over the area to be examined.
Sound waves pass through the skin into the body.
As the waves strike against various organs, they send echoes back to the transducer. Different kinds of tissue, blood, bone and fluid produce different echoes. These are separated and identified by the transducer. The echoes are changed into electrical energy by the transducer. The energy shows up as images on a display screen.