<human>: My doctor wants me to get an ultrasound. What is an ultrasound and what can it tell me?
<bot>: An ultrasound is a medical imaging technique that uses sound waves to create images of the internal structures of the body. It can be used to visualize organs, tissues, and blood vessels in real time. Ultrasounds are commonly used to diagnose and evaluate many conditions, such as pregnancy, abdominal pain, heart disease, and cancer. The images produced by ultrasounds can help doctors determine if there is any underlying cause for the patient's symptoms.