Have received roughly 25msv of radiation from ct scans past three year. will have no more unless absolutely nessecary! 22yr m vegetarian, eat lots of fruits and veg, what is the risk of cancer? scared

Dosage and age: It is always good to minimize radiation exposure when possible. Radiation can damage dna, which sometimes can cause health problems. Another very important factor is age. I am much more concerned about a small child's exposure than an adult because a child's cells are much more sensitive to radiation. It is always risk vs. Benefit. Could consider other imaging (like mri) if more imaging is needed.

Radiation : Radiation from a ct exam is equivalent from standing in the sun for a day. 1–2 gy of radiation can cause nausea for less than 24 hours. Ask your radiologist how much gy of radiation you are getting because each study done by every machine is different. And ask your radiologist how much is safe for you before you do another procedure.

Less dose than airli: This is a very low dose compared to other risks in our environments. It is less than an airline attendant who makes a couple of transcontinental trips a year. I think we would all be well advised to limit unnecessary radiation but if there is a medical need i would have no problem getting another ct or pet scan. The only exception would be a pregnant woman in first trimester.