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Doctor insights on: Ct Radiation

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Heard pet scan expose equal radiation as ct.What will be the radiation for pet +ct which are using nowadays combined?Is it double the CT radiation?!

Heard pet scan expose equal radiation as ct.What will be the radiation for pet +ct which are using nowadays combined?Is it double the CT radiation?!

Variable: The exact radiation you get from ct and pet/cts varies based on the used protocol. Roughly speaking a diagnostic ct gives you a rad dose of 10-15 msv. Pet/cts are often done with low-dose ct, so instead of 10-15 msv you get 1-2 msv from the ct. For the pet portion is approximately 8-12 msv. So a regular pet/ct is approx 12-14 msv and if you add a diagnostic ct you get 10-15 msv more. ...Read more

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Dr. Neigatha Graney
1 doctor shared a insight

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


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Is it possible to reverse effect of CT radiation?What can I do to minimise effect of one chest CT with 4.8msv dose? Please help!

Is it possible to reverse effect of CT radiation?What can I do to minimise effect of one chest CT with 4.8msv dose? Please help!

Radiation effects: Radiation damage is irreversible. Use ct only when necessary. Theoretically, preventive water-soluble antioxidants (like vitamin c, n-acetylcysteine) may be able to scavenge some of the free radicals created by exposure to the ionizing radiation. ...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?

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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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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If a CT scan radiation gonna cause a brain tumor how many years it will take for the tumor to appear from the radiation 3 years is enough?

If a CT scan radiation gonna cause a brain tumor how many years it will take for the tumor to appear from the radiation 
3 years is enough?

Read more about it: To learn more about imaging and radiation, see: http://www.Conciergeradiologist.Com/ct-scan-radiation.Html and http://www.Conciergeradiologist.Com/radiation-exposure.Html. Properly indicated imaging studies represent, by definition, situations where the risks of radiation exposure are outweighed by the benefits to the patient. I wouldn't worry about ct scan radiation causing a brain tumor. ...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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Do i need to worry about a brain tumor caused by a 2 brain CT scan radiation i got 3 years ago if I have some dizziness now im 27 years old help me ?

Get checked,,,: You should get your dizziness checked out but at your age it's highly unlikely to be a brain tumor even with your history of ct scans. It's likely due to another possible cause, like lack of hydration, or sleep or too much lethargy/drowsy inducing medication. Still get checked if you're worried, but keep in mind one of these more likely explanations. Good luck. ...Read more

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Lumpectomy and radiation last year. Was small amt of cancer in node. Now small shadow on upper right lung CT but radiation on left side. Lung cancer?

Lumpectomy and radiation last year. Was small amt of cancer in node.  Now small shadow on upper right lung CT but radiation on left side.  Lung cancer?

Difficult to say: small shadow can be many different things. In the absence of old studies this could have been there for years. Old study is crucial before jumping to conclusions. Old granulomas from old infections can present the same way. It is best to err on the side of caution and have a follow up study to see if it changes before jumping to conclusions. ...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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Had a lot of CT scans.My dr always told me, cells repair after exposure to CT. How is radiation cumulative? How is the damage cumulative? Thank you

Had a lot of CT scans.My dr always told me, cells repair after exposure to CT. How is radiation cumulative? How is the damage cumulative? Thank you

Relax: While evidence-based physicians are required by the strictest laws to tell you the truth, it's actually profitable for charlatans to exaggerate, cynically, the dangers of today's medicine. The extra radiation you get from a CT scan today is equal to what you'd get from cosmic rays from living in Denver instead of Topeka for two months. The increased cancer risk isn't measurable. ...Read more

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How long do a CT scan send radiation into your body?

While: You are in the scanner and the images are being taken you are receiving a relatively small dose of radiation. Often this is less than a minute depending on what is being scanned. ...Read more

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What has more radiation ct's or x-rays? How much more?

CT: Ct has significantly more radiation than x-rays though the exact dose depends on a lot of specifics. The radiation from either is not extremely high to the extent that you should forego the exam when it is medically necessary. ...Read more

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Does having contrast with a CT mean more radiation? I'm so scared of cancer from the radiation i received now :( i was only 21

Worrying does not: Help. Ct scans do expose a person to radiation but also provide useful information and on balance are useful tests. There is no need to be scared as that will not change anything anyway. ...Read more

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In case of ct scan related radiation exposure why is it said that life time effects are cumulative when even a single scan carries risk.

In case of ct scan related radiation exposure why is it said that life time effects are cumulative when even a single scan carries risk.

Can't undo damage.: There are 2 biological effects of radiation: the 1st is random DNA damage - any stray radiation can permanently alter DNA & cause a mutation (cancer). The 2nd is "radiation sickness". Every organ has a lifetime limit of radiation that it can absorb; beyond the threshold, damage continues to mount. For the 2nd type, the time between radiation exposure doesn't matter, only the total lifetime dose. ...Read more

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Should I do & how much radiation CT scans for one dental implant causes vs regular chest/head CT scan or one digital tooth x ray. I am curious to know

Should I do & how much radiation CT scans for one dental implant causes vs regular chest/head CT scan or one digital tooth x ray. I am curious to know

Radiation dose chart: We only want to take the minimum number and type of x-rays or scans in order to properly diagnose and treatment plan. Without that we might either miss something or the final result might be compromised. Here is a good website for you to look at: http://www.Ans.Org/pi/resources/dosechart/. ...Read more

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Does the CT scan shows the radiation dose used in the scan in mSv?

Does the CT scan shows the radiation dose used in the scan in mSv?

10 mSv: A CT scan of the abdomen (belly) and pelvis exposes a person to about 10 mSv; this goes up to 20 mSv if the test is done twice (once with and once without contrast). ...Read more

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How long is it supposed to it take for the radiation from CT scan to have harmful effect?

It depends, if ever.: The tissue damage done by radiation exposure is related to the dose, the age of the patient and the organs that receive the dose, as well as genetic factors relating to the patient. Also, the time between exposures is important. Almost any single ct exam of any one body part is exceptionally unlikely to cause any harm. The issue is repeated imaging of the same area, particularly in young patients. ...Read more

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I'm trying to understand how much radiation a CT scan has. I've had two, but no more. Can it be average per say to have two and still be ok?Fearcancer

Do not worry: While CT scans do expose a person to radiation, the information gained is usually worth the slight risk. There are many things you can do to safeguard your health, e.g., maintain healthy weight, exercise at least 150 minutes/week, take HPV vaccine, avoid excessive sun/UV exposure, no tobacco or alcohol. ...Read more

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How can I detox radiation from ct scans? I'm refusing further tests, but I want to know if there's any way to help cells after 2lung ct scans & 1 head

How can I detox radiation from ct scans? I'm refusing further tests, but I want to know if there's any way to help cells after 2lung ct scans & 1 head

Sorry no way: No such thing as detox'ing yourself following radiation exposure. Nice concept....tincture of time is the ONLY thing known in the universe that dissipates excessive radiation from one's body. ...Read more