Ultrasound imaging is a medical technique that uses high-frequency sound waves to create images of the inside of the body. A device called a transducer emits these sound waves, which bounce off tissues and organs. The returning echoes are then converted into visual images on a monitor, allowing doctors to see structures like the heart, liver, and developing fetus during pregnancy. This non-invasive procedure is commonly used for various diagnostic purposes, including examining abdominal organs, monitoring pregnancy, and guiding certain medical procedures. Ultrasound is safe, as it does not involve radiation, making it a preferred choice for many patients.