Ultrasound, or sonography, is a noninvasive, radiation-free diagnostic tool that uses high-frequency sound waves to create real-time images or videos of internal organs, tissues, and blood flow. A, usually hand-held, transducer emits these inaudible waves and records the echoes reflecting off body structures, which a computer then translates into images (sonograms). Widely used for monitoring fetal development, examining soft tissues, and guiding procedures, it is safe, painless, and provides immediate visual information for medical evaluation.
