An ultrasound scan, also known as a sonogram, is a medical imaging technique that uses high-frequency sound waves to create images of the inside of the body. It is commonly used to monitor pregnancies, diagnose conditions, and guide certain medical procedures.

During a diagnostic ultrasound examination, a small handheld device called a transducer is placed on the skin over the area being examined. The transducer emits sound waves that bounce off internal structures and tissues. These sound waves are then converted into images that can be viewed on a monitor in real-time.

- non-invasive in nature
- real-time imaging capability
- lack of radiation exposure
- versatility in imaging different body parts.

Diagnostic ultrasound is widely used in various medical specialties, including obstetrics and gynaecology (for evaluating pregnancies), gastroenterology (for examining abdominal organs), and musculoskeletal imaging (for evaluating joints, muscles, and tendons).

It is commonly used for diagnosing and monitoring a wide range of medical conditions, aiding in treatment planning, and guiding procedures such as biopsies or injections.