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How does a computed tomography (CT) scan cause cancer?

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Some people worry about getting this test because radiation is known as a possible cause of cancer. Know that the chances of getting cancer from a CT scan are very low. And for many people, the test is worth the small risk of radiation exposure. It can help doctors spot dangerous health problems and check that treatment works.

Your doctor will make sure that the benefits you’d get from the scan outweigh the drawbacks before she recommends it for you.

From: Can CT Scans Lead to Cancer? WebMD Medical Reference

SOURCES:

American Cancer Society: "Can I avoid exposure to radiation from x-rays and gamma rays?"

FDA: "What are the Radiation Risks from CT?"

Mayo Clinic: "CT scan: Definition," "CT scan: Why it's done," "Tests and Procedures: CT Scan."

Memorial Sloan Kettering Cancer Center: "Scan Safety: A Radiation Reality Check."

National Cancer Institute: "Computed Tomography (CT) Scans and Cancer," "Radiation."

Radiological Society of North America: "I've had many CT scans. Should I be concerned?"

Reviewed by Melinda Ratini on June 27, 2017

SOURCES:

American Cancer Society: "Can I avoid exposure to radiation from x-rays and gamma rays?"

FDA: "What are the Radiation Risks from CT?"

Mayo Clinic: "CT scan: Definition," "CT scan: Why it's done," "Tests and Procedures: CT Scan."

Memorial Sloan Kettering Cancer Center: "Scan Safety: A Radiation Reality Check."

National Cancer Institute: "Computed Tomography (CT) Scans and Cancer," "Radiation."

Radiological Society of North America: "I've had many CT scans. Should I be concerned?"

Reviewed by Melinda Ratini on June 27, 2017

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Can a computed tomography (CT) scan cause cancer?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.