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Doctor insights on: Ct Scan Radiation Cancer Risk

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Hi! I have a ct scan tomorrow because of my severe headche and some pain. I want to cancel my ct scanbecause of the radiation that cancause cancer.

Hi! I have a ct scan tomorrow because of my severe headche and some pain. I want to cancel my ct scanbecause of the radiation that cancause cancer.

Terrible idea: Listen, Rica. Stop reading doctor-bashing websites written by crooks. If you have a leaking berry aneurysm, you'll either be dead or stroked-out soon without a diagnosis. The radiation from a scan is ~3 mSV, same as an airline pilot gets in a year, and nobody's shown an increased cancer rate in pilots; radiation safety allows 20 mSV/year and there's no increase in cancer either. Do what you must. ...Read more

Dr. Barry Rosen
4,298 doctors shared insights

Cancer (Definition)

Cancer is a group of diseases that is characterized by uncontrolled cell growth leading to invasion of surrounding tissues that spread to other parts of the body. Cancer can begin anywhere in the body and is usually related to one or more genetic mutations that allow normal cells to become malignant by interfering with internal cellular control mechanisms, such as programmed cell death or by preventing ...Read more


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When would CT scan cancer effects show up? If i received too much radiation as a result of CT scans, when would the cancer potentially show up? Could i get canncer in 10-20 years because of CT scan radiation?

When would CT scan cancer effects show up? If i received too much radiation as a result of CT scans, when would the cancer potentially show up? Could i get canncer in 10-20 years because of CT scan radiation?

Delayed, high dose: In general, ct scans do not by themselves cause cancer. You would have to have had dozens upon dozens to risk the development of cancer. Having said that, when radiation induced cancers development, they are usually in the field of radiation, and usually are sarcomas (soft tissue malignancies). Based on your age, you would have to have had hundreds of cts in a short time 15-20 years ago. ...Read more

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Just wondering if I were to have a ct scan of the chest what is the exposure to radiation and the likelihood of developing cancer from it?

Just wondering if I were to have a ct scan of the chest what is the exposure to radiation and the likelihood of developing cancer from it?

Chest CT radiation: exposure depends on the type of chest CT performed. Total effective dose for a "standard" Chest CT is about 7mSv. The theoretical increased lifetime cancer risk is about 0.04%. This is theoretical, there is some debate whether doses in this range have any effect. However, to put that risk into perspective, the average person is about twice as likely to die from drowning. ...Read more

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Can a CT scan radiation cause cancer in future? Done ct scan due to kidney stones. I am 52 male. Please reply.

Can a CT scan radiation cause cancer in future? Done ct scan due to kidney stones. I am 52 male. Please reply.

Don't worry!: The risk of getting cancer from radiation exposure to one CT scan is infinitesimally small. You get exposed to more radiation by living your routine life every day. But it's good to remember that radiation dose accumulates, so the more CT scans you have over your life, the higher the risk. It's always a good idea to keep track of how many tests you are having, and to remind your doctor! ...Read more

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How long does it takes to get radiation induced cancer? Should i worry after 5 to 10 years as i had on chest CT scan month ago with 4.8msv dose?

How long does it takes to get radiation induced cancer? Should i worry after 5 to 10 years as i had on chest CT scan month ago with 4.8msv dose?

May not even happen: The average ct scan in the us exposes us anywhere between 3 and 10 msv. A dose of 10 msv increases the risk of getting any cancer by 0.1% and the risk of fatal cancer by 0.05%. According to the national research council and the U.S. Fda, any person has a 20% risk of dying from cancer in their lifetime. One ct scan of 10msv would increase the chance to 20.05%. Not a big risk. Don't worry too much. ...Read more

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What would be in a CT scan report 2 cnfirm dat cervix cancer has reached advancd stage wher radiation&chemo has 2 b given please help 4 my mom?

What would be in a CT scan report 2 cnfirm dat cervix cancer has reached advancd stage wher radiation&chemo has 2 b given please help 4 my mom?

Cervical cancer: Usually if radiation or chemotherapy is been given, the cancer might be advanced already. Ct scan can show cancer beyond the cervix, affecting the uterine tissue and pelvic sidewall. It can say many things that would point that the cancer has spread. Look for cervical cancer staging in a search engine. ...Read more

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Had a sinus CT scan for a deviated septum/chronic sinusitis. Now i'm worried about cancer from the radiation. Is it unlikely?

Had a sinus CT scan for a deviated septum/chronic sinusitis. Now i'm worried about cancer from the radiation. Is it unlikely?

Very unlikely: While many studies have recently been published about radiation exposure & risk for cancer, the main concern is from repeated x-rays, not the occasional one. The media has also pointed out that it's important to go to reputable facilities that check their equipment regularly to insure appropriate dose is used. But in general, your risk for cancer from sinus ct scan is very unlikely. ...Read more

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If my head CT scan radiation gonna cause a brain cancer to me i need to start worry about it after 5 years or 20 years and more after the scan?Scared

If my head CT scan radiation gonna cause a brain cancer to me i  need to start worry about it after 5 years or 20 years and more after the scan?Scared

Very unlikely: If you are asking about the risk after a single head ct scan it is not measureable and is not considered a risk for developing a brain tumor. If for some reason you have many routine head ct scans especially if done throughout childhood there is a very small slight increase risk of developing a tumor but far less than .5%. The low dose of radiation from modern ct scans is negligible if used safe. ...Read more

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How much does my cancer risk increase after a CT Scan of the head as a teenager?

Almost no risk: Please see: http://www.scientificamerican.com/article/how-much-ct-scans-increase-risk-cancer/ also: 1) CT head exposure is mostly confined to the head, not the whole body. 2) There may be cellular repair at doses as low as CT, limiting cancer rates. (We don't know how much). 3) Whatever the theoretical risk, there must be a good reason to do the CT in the first place. ...Read more

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Please tell me if a single chest CT scan can lead to cancer? I am worried about cancer risk.

Please tell me if a single chest CT scan can lead to cancer? I am worried about cancer risk.

CT scan risk: There are items that can increase the lifetime risk of cancer. A single ct chest scan will increase that risk more than an xray. But if you need the ct chest scan, than the benefits can outweigh the risk. Smoking is a much worse avoidable risk factor for cancer. Also, to decrease cancer risk, eat a healthy diet including fruits and vegetables and reduce red meat. ...Read more

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I had one CT angio full body and one full body CT scan last yr in a10 day period. The total exposure was 52 msv. What is my cancer risk? I am 27.

I had one CT angio full body and one full body CT scan last yr in a10 day period. The total exposure was 52 msv. What is my cancer risk? I am 27.

Remote: Excessive radiation carries some risk of causing Cancer but many years later(>10 years). Only doses in excess of 100 msv carry significant risk. In your case, my guess is that, the odds are less than one in thousand individuals. ...Read more

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I have been reading about danger of CT scan and the cancer risk later in life. I had one chest ct. Is it possible to get cancer later from that CT ?

I have been reading about danger of CT scan and the cancer risk later in life. I had one chest ct. Is it possible to get  cancer later from that  CT ?

Not likely: We are all exposed to radiation all the time in low amounts. Ct scans do expose a person to small amount of radiation, but these tests provide a lot of useful information. It is not likely that you will get cancer, that you were not going to get otherwise, by having one ct. ...Read more

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I am worried about my cancer risk as i had one CT scan to rule out lymphoma. I am 30yr and healthy. I am not able to sleep because of fear from ct.

I am worried about my cancer risk as i had one CT scan to rule out lymphoma. I am 30yr and healthy. I am not able to sleep because of fear from ct.

VERY low risk: If i understand your question correctly, you are concerned about developing cancer because you had a ct scan. You should not worry, having one ct scan has essentially no effect on your future risk of developing cancer. ...Read more

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What can be done to reduce cancer risk after CT scan (chest). I m worried about thyroid cancer as it is related to chest CT scan.

Don't worry: Hello - the radiation exposure from one ct scan is low. You do not need to worry about thyroid cancer because of a ct. We are exposed to radiation throughout our normal daily routines and when we fly. If you'd like you can limit other exposures. Request pat-downs at security at airports instead of the scanner for example. I don't think you need to do anything, however. ...Read more

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What are the chances of getting lung cancer from one chest CT scan? I had one chest CT scan month ago and i m worried about cancer risk.

What are the chances of getting lung cancer from one chest CT scan? I had one chest CT scan month ago and i m worried about cancer risk.

None!: You cannot get cancer from one routine ct scan. It takes more than dozens of ct scans over a life time, even then it is rare to have this problem. Otherwise we will be foolish doing ct scans on people in order to help them! ...Read more

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a 3cm nodule on the right thyroid.. left side removed already The ct scan indicated 1.5cm rt upper lung. related? cancer risk?

 a 3cm nodule on the right thyroid.. left side removed already The ct scan indicated 1.5cm rt upper lung. related? cancer risk?

More evaluation: You will need more evaluation. You need to give a better history. What kind of thyroid lesion did you have before? Why was only this lobe removed? You need to follow closely with your doctor and further testing ...Read more

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Had an adnominal/pelvis ct scan, a chest X-ray, and a lumbar spine X-ray all within a year. Does this significantly increase my cancer risk??

No: The radiation exposure form these studies is not likely to measurably increase your risk of cancer. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. ...Read more

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I've had a vcug, cat scan and x-rays. Can the radiation from those tests cause cancer?

I've had a vcug, cat scan and  x-rays. Can the radiation from those tests cause cancer?

NO: Do not worry, occasional diagnostic x-ray scans ( ct< x - rays etc) will not cause cancers., amount of radiation is low. ...Read more

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I've had a vcug, cat scan and chest/back/spine x-rays. Can the radiation from tests cause cancer?

All radiation: It is dose related and dependent on whether it is ionizing (alpha or beta rays), or non-ionizing (gamma and x-rays). Very slight increases in cancer occur in people with many x-rays. ...Read more

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I had one chest CT with 4.8msv dose, is it too much radiation? Will it cause cancer years later? I am worried about cancer risk. Please help!

I had one chest CT with 4.8msv dose, is it too much radiation? Will it cause cancer years later? I am worried about cancer risk. Please help!

Stop worrying buddy: Pilots get an extra 3 mSV every year and nobody's shown an increased cancer risk. Be thankful for good health and the technology that will detect serious disease while it's treatable. ...Read more

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I am a lung cancer servivor of 15 years I have had bronchitus since mid july I have had a chest xray and a cat scan and my lungs are fine my cancer treatment was surgery to remove top lobe of left lung and 6 and a half weeks of radiiation?

I am a lung cancer servivor of 15 years I have had bronchitus since mid july I have had a chest xray and a cat scan and my lungs are fine my cancer treatment was surgery to remove top lobe of left lung and 6 and a half weeks of radiiation?

COPD?: Sounds like your cancer is cured, congratulations, you are one of few! you probably smoked and this lingering bronchitis may be uncontrolled copd. Check with your doctor for bronchodilators +/- steroids. Radiation pneumonitis would be very unusual after all this time. ...Read more

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I had 2 ct scans and 5 x-rays in past 2 years. All ok. No more. Scared of diagnostic radiation. Am I for sure going to get cancer compared to others?

I had 2 ct scans and 5 x-rays in past 2 years. All ok. No more. Scared of diagnostic radiation. Am I for sure going to get cancer compared to others?

No: With 2 CT scans and 5 x-rays in 2 years, you have had significant radiation exposure. it is unlikely that you have significantly increased your likelihood of getting a cancer in the future with that small amount of exposure. However, your concern is based on fact as excessive radiation exposure can increase cancer risk. Yor are 23 and should not continue that pattern of radiation exposure. ...Read more

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Any khnown registered person in the usa or even the world who got cancer or tumor from a CT scans radiation years later ? Any known case?

Probably: But not exactly. A large scale study showed an increased incidence of cancer a group that had more cts than control group but no more direct evidence than that. Of note, this was in children and they were from scanners dating many years back and the cumulative doses they received were very large by today's standards. Should you be wary, yes but i would not avoid a necessary scan. ...Read more

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Dr. Adam Lewis
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Computed Tomography (Definition)

Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! the image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more


Dr. Michael Gabor
1,836 doctors shared insights

Ct Scan (Definition)

Ct scan uses data from a beam of xrays and reconstructs a cross sectional image of your body. It is a high dose of xrays and used only when the benefits outweigh the risk. Cancer risk is 1 in 500 in children. Also using iodinated contrast might cause transient renal failure in about 5% of patients. (contrast induced nepropathy) most do not explain this to the patient as ...Read more