A member asked:

Is ct scan is the major risk factor for cancer? should i be worried if i had one ct scan at the age of 30yr?will it cause cancer later in the life?

4 doctors weighed in across 3 answers
Dr. Tso Chen answered

A risk: Ct scan can cause a very small increase in the risk of cancer if frequent scans are done over the lifetime. Currently, there is no guideline recommending the limit of ct scans. Having one ct scan at age 30 is likely not to have any significant consequence. Be sure to discuss with your doctor before each scan to see if it's medically necessary.

Answered 7/2/2015

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Not the biggest risk: Risk of one scan increases your lifetime risk about 0.08%...Low energy scans now even less. Annual from age 25 onward is about 3.8% risk. Older ct's were 1300 mrem...Annual exposure just living is 300 or so...If you live some places it can be 500 or 600 (more rock...Etc.). If it was needed, it likely helped more than hurt. If not needed, we teach to avoid unneeded radiation.

Answered 10/23/2017

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Forgive my frankness: A CT scan delivers around 3 mSV of radiation, the same as the extra radiation that an airline pilot gets in a year. Nobody's shown an increase in cancer in pilots. Radiation safety officers allow workers 20 mSV/year, and these workers don't get more cancer either. Do yourself a favor and stop reading doctor-bashing websites written by crooks. If you needed the scan, any risk was well worth it.

Answered 7/2/2015

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