Do not worry much.. Maintain a healthy nutritious diet rich in antioxidants ..avoid smoking and alcoholism.. Protect from pollution .. Any scan is taken wen benefit outweighs risk..

No. Need not worry. Pregnant mothers should not get radiation which might affect the future kids. Frequent radiation exposure to the same person might affect the person in long term. There is a permitted dosage of radiation exposure upto which usually nothing happens. Health workers in Radiology department and Radiation oncology are at risk.