45yo f. ive had 4 ct scans and 2 x-rays plus a dental x-ray within a year. for various health issues (head, abdominal and chest). may need another ct. im concerned about radiation exposure and possibility of cancer? is that too much in a year?

Radiation exposure from regular and dental X-rays is minimal so the main exposure will be from a total of 5 CT scans, a total of 30 mSv in average. The risk is there but it is considered insignificant compared with the benefits if the CT follow-up is absolutely indicated. In general, for any one person the risk of radiation-induced cancer is much smaller than the natural risk of cancer. Take care.