Low Dose CT scans are recommended for individuals who are at high risk for certain types of cancer. For example, the U.S. Preventive Services Task Force recommends annual Low Dose CT scans for adults aged 50 to 80 years who have a 20 pack-year smoking history and currently smoke or have quit within the past 15 years. Your healthcare provider will assess your risk factors to determine if you are a candidate for this type of screening.