The process relies on a handheld device called a . When pressed against the skin (usually with a water-based gel to eliminate air pockets), it emits inaudible sound waves into the body. These waves bounce off internal organs and tissues, creating "echoes" that the transducer captures and a computer converts into live images or videos called sonograms . Common Applications Ultrasound
Diagnostic ultrasound, or sonography, is a safe and noninvasive imaging method that uses high-frequency sound waves to visualize internal body structures in real-time. Unlike X-rays, it does not use ionizing radiation, making it the preferred tool for monitoring pregnancy and examining delicate soft tissues. How It Works Diagnostic ultrasound