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Doctor insights on: How Much Radiation Exposure With Ct Scan With Contrast

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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

Dr. Andrew Berry
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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What are potential side effects of CT scan due to radiation exposure?

What are potential side effects of CT scan due to radiation exposure?

Depends: I depends on how old you are when you get the scan. The younger you are and the more scans you get the higher the risk. Some studies say there is significant risk for white blood cell cancers. A one off scan is unlikely to cause cancer in itself but it not entirely risk free. If there is a good reason to do the test it would have to be balance against the risk of the scan. ...Read more

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How much radiation exposure is in a 3-D Digital Dental CT Scan?

How much radiation exposure is in a 3-D Digital Dental CT Scan?

CBCT Scan: See the following website for some basic information. It depends upon particular brand of unit, software, and extent of area scanned. The office actually doing the scan can give you more accurate information. Call and ask. Http://www. Dent. Umich. Edu/patients/cbct-imaging-service-frequently-asked-questions#radiation ...Read more

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How much radiation exposure on a barium swallow. Just wondering since may need a ct scan?

How much radiation exposure on a barium swallow. Just wondering since may need a ct scan?

Radiation dose: From Barium Swallow averages about 6mSv. The theoretical (and it is only theoretical) increased cancer risk from this amount of radiation is 0.03% over your baseline lifetime risk. To put this into perspective, you are three times more likely to die by drowning. ...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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Is the radiation exposure from a study with dual injections of both iodinated-RISA and 99-m-technetium worth it? And the fact it's injected and present in blood over time worse than a single ct scan?

Is the radiation exposure from a study with dual injections of both iodinated-RISA and 99-m-technetium worth it? And the fact it's injected and present in blood over time worse than a single ct scan?

Minimal risk: The radio-emittance from these products are beta radiation which has minimal penetration and the products rapidly decay so the exposure to your body is trivial. You in fact get more dosage from a CT scan, but that is also not pathologic in one exposure. Hopefully your scans will guide you to better health. ...Read more

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Is it unethical for a doc to order a CT scan but not inform patient of the amount of radiation exposure and slight increase risk of cancer with scan?

Is it unethical for a doc to order a CT scan but not inform patient of the amount of radiation exposure and slight increase risk of cancer with scan?

Not ethics issue: It is common knowledge that x-ray studies such as regular x-ray films or CT scans do put out a bit of radiation, and that radiation does not noticeably increase "one particular person's risk of cancer, " when added to the radiation risks for cancer she already experiences just by living on planet Earth. Doctors do discuss the risks of getting repeated x-rays, but that is a different situation. ...Read more

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I've had a neck ct scan and four x-rays and a hida scan? I'm worried about the radiation exposure... Should I? All in the past year, I'm a 34yr F.

CT scan; not the Xra: CT scans involve ~400 times more radiation exposure as Xrays, & so if u worry abt unnecessary radiation risk, limit CT scans. HIDA & Xrays involve so little radiation that u prob got as much from walking outside in 1 yr as u got from those tests. At 34, most of ur organs have developed, so there's no immediate threat; however, there's a lifetime radiation limit. Too much testng will catch up [email protected] ...Read more

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I had 2 CT scans within a month. Is that really dangerous? What problems could this pose? Worried about radiation exposure.

Not to worry: Depends on why you had those scans. One must balance the risks against the benefits. If these are the only 2 scans you have then there is an extremely minimal risk from the radiation of the CT. ...Read more

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How long does it take for side effects of radiation exposure (eg via CT scans) to show up in human body (God Forbids).Is it years or months?

How long does it take for side effects of radiation exposure (eg via CT scans) to show up in human body (God Forbids).Is it years or months?

With exposures: In the ranges of diagnostic imaging, lifetime effects are cumulative. The risks are generally very small and hypothetical, but that said, it would probably take a radiation induced cancer 20 years to become apparent. It would depend on the type of cancer as well. ...Read more

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How much CT and pet scans are safe in one year from radiation exposure on 59 yea old woman diagnosis lung nodules. One more year to go for monitoring

How much CT and pet scans are safe in one year from radiation exposure on 59 yea old woman diagnosis lung nodules. One more year to go for monitoring

Check with your ---: Radiologist as they would be give you precise information about the dose of radiation one gets with each scan. Call your hospital's x ray dept and they can put in touch with him/her.

Good luck. ...Read more

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Is there a tool that a DR. Can use to check the level of patients radiation exposure from all the x-rays and CT scans in ones life?

Is there a tool that a DR. Can use to check the level of patients radiation exposure from all the x-rays and CT scans in ones life?

No: The list of Possible Things To Worry About from cradle to grave is infinitely long. The radiation exposure from medical testing is low on that list, unless one has a bad medical disorder and is getting repeated scans over and over. ...Read more

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I've had 4 CT scans in last 15 months 3 head CT and 1 chest ct. Should I be concerned about radiation exposure from so many scans in short period?

I've had 4 CT scans in last 15 months 3 head CT and 1 chest ct. Should I be concerned about radiation exposure from so many scans in short period?

Seems like a lot: That does seem like a lot of exposure but must ask why? Why so many? What is everyone looking for? Sometimes the benefit out weighs the risk. Sometimes you need it. I would say: sit down and have a long talk with your doctor to understand the issues they are looking for. Then decide ...Read more

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Do SSRIs cause brain cancer? I had a ct brain scan and I'm afraid to take my medication because of the medication with the radiation exposure.

Do SSRIs cause brain cancer? I had a ct brain scan and I'm afraid to take my medication because of the medication with the radiation exposure.

Not a known risk: SSRI medications are not a known risk factor for brain cancer. Radiation from a CT scan provides very very low, but not zero, risk for cancer. But, typically the diagnostic benefit of doing the scan far outweighs the very small risk of cancer. ...Read more

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I had 2 CT scans last week! (my doctor is unaware of all my radiation exposure) but is this bad if I go once more for my throat?

Radiation: Diagnostic radiation is a risk/benefit consideration. In most cases, the benefit of the scan outweighs the slight increased risk. You can get an estimate of your risk with an interactive tool at xrayrisk. Com ...Read more

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How much radiation exposure comes with a CT of neck?

Depends on scanner: This will vary with the scanner, somewhat. I found an assessment/estimate of this with a google search and I really can't do better than this. You would need to get several pieces of information off the scanner and would need to account for the technique- single or multiple passes, etc. See: http://answers. Google. Com/answers/threadview/id/742075.Html. ...Read more

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Radiation exposure in facial bones cbct? Dr suggests cbct, but I've already got xr, ct+3xcbct to head in last 3 yrs. I'm concerned about cumulative dose.

Radiation exposure in facial bones cbct? Dr suggests cbct, but I've already got xr, ct+3xcbct to head in last 3 yrs. I'm concerned about cumulative dose.

CBCT Concerns: I would have the dr evaluate those other images you have had done and see if they could be of use today! If there is any consolation, the digital images today expose you to a third or less of the previous radiation exposure! ...Read more

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I am a hypochondriac but have it under control. However, I was a little worried about the radiation exposure from multiple brain CT and chest angiogram. What should I do?

I am a hypochondriac but have it under control. However, I was a little worried about the radiation exposure from multiple brain CT and chest angiogram. What should I do?

Hypochondria: Get the facts from your doctor, make a note of what he or she tells you, review the note when your thoughts get carried away. Every day try as much as possible to be fact oriented and try to discover the origin of your anxiety. Try using the free anti anxiety app featured on the soundmindz. Org web site. Best. ...Read more

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Is there a lot of radiation associated with a CT scan with contrast for the renal area? Can the contrast cause an allergic reaction?

Is there a lot of radiation associated with a CT scan with contrast for the renal area? Can the contrast cause an allergic reaction?

No: CT of abdomen is a fairly routine test and not considered a radiation danger. Th incidence of allergic reaction to contrast is 1-3% with non-ionic agents and 4-12% with ionic contrast agents. Non-contrast agents are the type generally used today. The benefit from the diagnostic value of the test far exceeds the risk of these 2 issues. Hope this answers your question. ...Read more

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I'm a 30 year old male. I had one CT scan done without contrast and now have to do one with contrast, is this a dangerous amount of radiation?

I'm a 30 year old male. I had one CT scan done without contrast and now have to do one with contrast, is this a dangerous amount of radiation?

Benefit ;: Risk depend on indication for studies. We tend to select who to do both. Many scans are now low dose. It's best to have a family doctor that knows you and decides when to do ct's rather than er which does more. The risk is population based, trivial increase for individual (1 in 10 thousand to 2/10k). ...Read more

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I was given a CT scan to check if I had appendicitis and given a contrast for it. Will the radiation cause genetic problems to my future children&eggs?

I was given a CT scan to check if I had appendicitis and given a contrast for it. Will the radiation cause genetic problems to my future children&eggs?

I wouldn't think so: The radiation of a single ct scan in unlikely to have significant effect on your reproductive health. All of us are exposed to gamma radiation from the sun every day & other lifetime exposures to alcohol, illness, environmental issues add up over time. Enough people have faced this issue without a cascade of new problems to say it is unlikely. ...Read more

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During CT scan I was directed by machine to hold breath 4 times. Does it mean 4 scans were done i.e. I was exposed to radiation 4 times?

During CT scan I was directed by machine to hold breath 4 times. Does it mean 4 scans were done i.e. I was exposed to radiation 4 times?

CT Scan: During many types of CT scan, the patient will be instructed to hold their breath at times. The reason is to stop the heart/lungs/chest from moving up and down during imaging.
A complete CT typically has several imaging sequences. The amount of total radiation is the sum of the images necessary for a study. It is likely that you were receiving some X-rays during each breath hold. ...Read more

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How would I know how much radiation I received on my recent CT scan when apparently they vary according to the scanner used/where you get it done?

Ask where done: Ask at the place where you had the scan done, they should have records of what they did and should be able to tell you how much radiation you were exposed to. ...Read more

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I had a CT scan done on my chest for the first time and was wondering if it's normal to have 4 images taken at once? Is that alot? To much radiation?

I had a CT scan done on my chest for the first time and was wondering if it's normal to have 4 images taken at once? Is that alot? To much radiation?

Not sure: What you mean by four images at once. Do you mean it was a 4 detector spiral/multi slice scanner? If so, then that is the way the scanner normally operates. Did they actually scan your chest 4 times? That would be unusual. Did they do 4 sets of reconstructions after the scan? That is normal post processing from data obtained from a single scan. Can you be more specific? ...Read more

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Help please? How much radiation in a CT scan?

Help please? How much radiation in a CT scan?

Depends on what kind: The info provided on the chart if you go to the link below should be very helpful. It will show you the radiation dose for many different radiology exams.

http://www. Radiologyinfo. Org/en/safety/? pg=sfty_xray. ...Read more

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Is getting a second CT scan within a year too much radiation?

Is getting a second CT scan within a year too much radiation?

Too much?: "too much" is a relative term. Basically no. If you have a medical condition, ie cancer that is being monitored by ct then the benefits outweigh the risks. If you are getting a ct for no reason then the risks (small but finite) outweigh the benefits. Any medical procedure is not a binary state. There is a continuum of risks and benefits. ...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

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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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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What are the risks of getting a CT scan with regards to radiation and all that?

What are the risks of getting a CT scan with regards to radiation and all that?

Minimal: A cat scan is a fairly safe procedure.
A single exam to a part of a body does not have significant risk as far as radiation exposure.
An exam using IV contrast has a slight risk for contrast reaction. Serious reactions are quite rare. If you have a significant allergic history (significant allergic response to multiple things) your risk is slightly greater. ...Read more

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Is it true a single CT Scan is comparable to the same amount of radiation you can get from a day at the beach? Is that a good example/analogy?

Is it true a single CT Scan is comparable to the same amount of radiation you can get from a day at the beach? Is that a good example/analogy?

No --: More like a year on the beach. CT scans can be lifesaving, but give you a major blast of radiation. They should not be done routinely. ...Read more

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R u exposed to any radiation when u do a xray or CT scan...

Yes: X-rays and ct scans are based on radiation for visualization. Thus there is definite radiation exposure when using these modalities. Mri is based on magnetic waves and does not use radiation. ...Read more

Dr. Tanya Russo
1 Doctor shared a insight

Exposure To Radiation (Definition)

Exposure to low levels of ionizing radiation from X-rays, CT scans and radioactive materials increases the chance of various cancers and leukemias later in life. Microwaves and other radio waves, such as the transmissions from cell phones, do ...Read more


Dr. Michael Gabor
1,885 Doctors shared insights

Ct Scan (Definition)

Computed tomography (ct scan) or computed axial tomography (cat scan), is a medical imaging procedure that utilizes computer-processed x-rays to produce tomographic images or 'slices' of specific ...Read more