A chest CT scan is not harmful. There is of course a certain radiation exposure but 1 study is generally not an issue of concern. Multiple studies could potentially become a problem Related to radiation exposure.

If you háve a chest CT yearly NO! But if you have few done yearly YES!

Not usually, but there are rare exceptions. One would have to have a great number of scans and wait for at least ten years to see any untoward effect.

A chest CT delivers higher radiation than a chest x-ray however CT images allow the radiologist to see the very fine detail of the structures in your body. They provide valuable information about your health and help your doctor make an accurate diagnosis. Imaging centers and hospitals apply the principles of ALARA (As Low As Reasonably Achievable) every effort is taken to decrease radiation risks. The benefit gained from medical imaging, which can aid in diagnosis is greater than the risk that comes with a CT scan.

Speak with your doctor or the radiologist about any concerns or the risks of a procedure.