No, an ultrasound does not use electromagnetic radiation. Instead, it uses high-frequency sound waves to create images of the inside of the body. These sound waves are emitted by a transducer, which is placed on the skin. The waves travel through the body and bounce back when they encounter different tissues, creating echoes. The transducer then picks up these echoes, and a computer converts them into real-time images.
Unlike X-rays or CT scans, which use electromagnetic radiation, ultrasounds are considered safer because they do not expose the body to ionizing radiation. This makes them a preferred imaging method, especially for pregnant women and developing fetuses.