Sonography is a diagnostic medical test that uses high-frequency sound waves-also called ultrasound waves-to bounce off of structures in the body and create an image. The test is often referred to simply as an ultrasound or as a sonogram.
Sonography uses a device called a transducer to send out ultrasound waves and listen for the echo. A computer translates the ultrasound waves into an image. A trained technician can see, measure, and identify structures in the image. A specially trained physician then reads the images to help diagnose medical conditions.
Ultrasonography uses high-frequency sound (ultrasound) waves to produce images of internal organs and other tissues. A device called a transducer converts electrical current into sound waves, which are sent into the body’s tissues. Sound waves bounce off structures in the body and are reflected back to the transducer, which converts the waves into electrical signals. A computer converts the pattern of electrical signals into an image, which is displayed on a monitor and recorded as a digital computer image. No x-rays are used, so there is no radiation exposure during an ultrasonography.