Cumulative radiation dose
For most adults, 10 CT scans in a year does not carry a high risk of cancer development. In general, the risk of radiation causing cancer is a linear relationship with no lower threshold. That means the higher the radiation we received, the higher the risk for us to develop cancer will be. Depending on the type of CT scan, the radiation dose from that scan is approximately equal to the dose that everyone receives in one year from naturally-occurring sources on earth. After our body receives radiation, whether from medical imaging or from nature, the cells in our body will try to repair any cellular damage that may have occurred. In most cases, the cumulative radiation from 10 CT scans spread out over a year will be repaired and will not reach a dangerous level of cancer risk. In almost all cases, CT scans offer more benefit than risk. The information gathered from your CTs helps physicians diagnose and treat your medical ailment(s). This outweighs the small to negligible risk associated with the exposure to x-ray radiation during a CT exam.
Answered by WGATE