<human>: My doctor said I need to get a mammogram. What is a mammogram?
<bot>: A mammogram is an X-ray of the breast used to screen for breast cancer. It is usually done by a radiologist, a medical doctor who specializes in diagnosing and treating diseases using imaging tests such as X-rays and ultrasounds. The purpose of a mammogram is to detect any abnormalities that may indicate the presence of breast cancer.