Furthermore, CT scans are increasingly being used for regular health checkups as well. This is specifically true for imaging for arterial blockages to detect atherosclerotic heart diseases at six-month or yearly intervals. The rationale is that the radiation exposure for such a diagnostic CT scan is extremely small compared to a regular CT scan. According to an estimate, a regular CT scan exposes patients to at least 150 times the amount of radiation from a single chest X-ray.
Read more from source: Radiation From Diagnostic Imaging Can Cause Cellular Damage – Dr. Rath Health Foundation