Sonography, also known as ultrasound or ultrasonography, is a non-invasive diagnostic medical test that uses high-frequency sound waves to create images of structures inside the body. The sound waves are sent into the body using a wand-like device called a transducer, which is moved across the skin over the area being examined. The sound waves then bounce off the structures inside the body and are picked up by the transducer, which sends them to a computer that turns them into images on a screen. Sonography can be used to examine many parts of the body, including the abdomen, pelvis, heart, blood vessels, and fetus during pregnancy.

During the procedure, the patient will typically lie on an examination table and remove clothing from the area being examined. A special gel is applied to the skin over the area being examined to help the sound waves travel through the body and prevent air pockets from blocking the images. The sonographer then moves the transducer over the skin, sending sound waves into the body and capturing the resulting echoes to create images on a computer screen. The procedure is usually painless, although some patients may experience mild discomfort as the transducer is moved over the skin.

Sonography is a safe and widely used diagnostic tool that can provide valuable information for diagnosing and treating a variety of diseases and conditions. It is often performed by a sonographer, a healthcare professional who has special training to do ultrasound exams.