Top
20
Doctor insights on: X Ray Vs Ct Scan Radiation Exposure

Share
1

1
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.

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 2u@80 ...Read more

Dr. Tim Conrad
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


2

2
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

3

3
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

See 1 more doctor answer
4

4
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

5

5
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

6

6
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

7

7
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

9

9
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

See 1 more doctor answer
11

11
Do nuclear scans expose a patient to more radiation than an X-ray or CT scan?

Not usually: Depends on nuclear study. A lot of CT exams such as chest and abdomen have more radiation dose than most nuclear medicine studies. A bone scan is more dose than the CT of brain. In any event if study is necessary for diagnosis to help patient the dose becomes insignificant. ...Read more

See 2 more doctor answers
12

12
I have some right superior mediastrinal widening in chest x ray. Dr asking for CT san. I m worried about radiation from ct. Should i get CT scan?

I have some right superior mediastrinal widening in chest x ray. Dr asking for CT san. I m worried about radiation from ct. Should i get CT scan?

Yes: You need to know what the widening is. Most time it is a vessel . Sometimes lymph nodes. The amount of radiation from one ct is minimal as long as the number of these studies is kept to a minimal amount. Of course that would depend on what they find. ...Read more

13

13
My 3 yo may have enlarged adenoids. Dr wants to do x-ray. He's had 7 chest x-rays and one brain CT scan. I'm afraid of all of the radiation. Advice?

My 3 yo may have enlarged adenoids. Dr wants to do x-ray. He's had 7 chest x-rays and one brain CT scan. I'm afraid of all of the radiation. Advice?

Probably ok: You always have to weigh benefit versus damage with ionizing radiation. The amount of radiation that the child received so far is acceptable. The worst amount of radiation is from repeat ct exams especially of chest and abdomen . Adenoid exam should involve a single lateral projection of the neck. If snoring, mouth breathing, or sleep apnea probably problem with enlarged adenoids and tonsils. ...Read more

See 1 more doctor answer
14

14
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

See 2 more doctor answers
15

15
Does bone scan process involve any exposure to radiation as in x ray?

Does bone scan process involve any exposure to radiation as in x ray?

Yes: Both x-ray an isotope for bone scan produce ionizing irradiation. Exposure from isotope of bone scan in adult is about 6 msv. This is similar to some ct scans.The only imaging methods not involving irradiation are ultrasound and magnetic resonance imaging mri. Information from each test is not the same. ...Read more

17

17
Which one has the most radiation mri, X-ray or a cat scan?

Which one has the most radiation mri, X-ray or a cat scan?

CT radiation: Ct has the most. It is the equivalent of multiple x-rays. Mri has no radiation. ...Read more

See 2 more doctor answers
18

18
Too much radiation? Recently, i had a cat scan of my sinuses and a chest x-ray. They are thinking about getting a cat scan of my brain. But to my understanding that's a lot of radiation in a short amount of time. How long are you supposed to wait until th

Too much radiation? Recently, i had a cat scan of my sinuses and a chest x-ray.
They are thinking about getting a cat scan of my brain. But to my understanding that's a lot of radiation in a short amount of time. How long are you supposed to wait until th

The : The amount of radiation from ct is certainly higher than from traditional plain film xrays, and you're right to wonder about the risk. However, there are a couple of important issues to consider. First of all, if there's a clinical problem that needs to be sorted out, and if ct is the best way to do that, then the amount of radiation from one additional study is probably not worth worrying about: you're far better off getting a diagnosis that leads to treatment than missing that diagnosis because the full evaluation was not completed. Secondly, you should know that the risk of radiation from cts (and other sources) have to be looked at in both short term and long term perspectives. Without getting too involved in physics, the message is this: a lot of xrays in a short period of time can cause short-term injuries like skin burns and hair loss, whereas a large number of xrays over a lifetime may increase the risk of cancer. It's very unlikely that another ct scan (or even several) right now would cause a skin injury--that's much more likely with image-guided procedures like coronary angiography. On the other hand, your risk of developing cancer from ct imaging (though very small) is the same whether the cts are done all at once or spread out over several years. What it boils down to is this: if your doctor has a specific concern and needs more imaging to make a diagnosis, then getting another ct is probably a good idea. Waiting a while won't make any real difference, except perhaps to delay your treatment. If, on the other hand, he or she is just "covering the bases, " then it may not be worthwhile. You might ask your doctor what, specifically, he or she is looking for and why he or she can't use other tests. ...Read more

See 2 more doctor answers
19

19
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

See 1 more doctor answer
20

20
I've had a vcug, cat scan and chest/back/spine x-rays. Can the radiation from tests cause cancer?

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

See 2 more doctor answers
Dr. Michael Gabor
1,850 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


Gamma Rays (Definition)

This is light of extremely short wavelengths typically produced either among the stars / in cosmic rays or by radioactive element decay. Gamma rays form the background of normal radiation in which we all live; it is substantially greater than the exposure we get from imaging scans or should get from ...Read more