A prenatal ultrasound test uses high-frequency sound waves, inaudible to the human ear, that are transmitted through the abdomen via a device called a transducer to look at the inside of the abdomen.

Sonograms and ultrasounds are closely related but refer to different things. An ultrasound is an imaging tool that produces a sonogram. Often, the terms sonogram and ultrasound are used ...

MR-guided focused ultrasound is a non-invasive procedure that reduces hand tremor symptoms. A focused ultrasound may be life-changing if you have essential tremor or tremor-dominant Parkinson’s ...

A liver ultrasound is a noninvasive test that produces images of a person’s liver and its blood vessels. A liver ultrasound can help diagnose various conditions that affect the liver, such as fatty ...