Ultrasound devices are medical instruments that use high-frequency sound waves to create images of the inside of the body. These images help doctors diagnose and monitor various conditions, such as pregnancy, organ health, and blood flow. The procedure is non-invasive and does not involve radiation, making it a safe option for patients. The technology behind ultrasound involves a transducer that emits sound waves and captures the echoes that bounce back from tissues. The resulting images, known as ultrasound scans, can be displayed in real-time, allowing healthcare professionals to assess the condition of organs like the heart and liver effectively.