Are Computer Tomography (CT) scans readily available across the United States? DR. Claudia Henschke: I think there are centers throughout the country; the key thing is for you to ask at that center, do you have a screening program and if so how long have you been screening and to understand that there is multiple disciplinary team of radiologist, surgeons, pathologist, oncologist, pulmonologist, all of those medical specialties really should be involved in the screening program.