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Doctor insights on: Cat Scan Vs X Ray

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How detrimental is an X-ray or cat scan to a fetus?

How detrimental is an X-ray or cat scan to a fetus?

See below: An xray is extremely unlikely to cause any harm whatsoever. A ct scan is still safe, but does present a dose of radiation that, depending on the type of scan, can approach the unsafe threshold. ...Read more

Dr. Michael Gabor
1,916 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


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Does pneumonia always show up on a cat scan and an X-ray ?

Does pneumonia always show up on a cat scan and an X-ray ?

Just about always: The short answer is yes. Only in very rare circumstances will a pneumonia be invisible on both xray and CT scan. ...Read more

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Can cat scan of chest and X-ray of chest have different results?

Can cat scan of chest and X-ray of chest have different results?

Yes: The chest xray is a regular xray and may not show everything that is present in the chest area. A ct scan has more cross sectional images with a higher resolution so that abnormal and normal findings can be viewed better. ...Read more

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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

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Normal cat scan, x-ray, and ultrasound - pain in right lower lung or upper abdoman still in pain, what's wrong? (right side)

Normal cat scan,  x-ray, and ultrasound  - pain in right lower lung or upper abdoman still in pain, what's wrong? (right  side)

Abdominal pain: It's encouraging that imaging studies are normal, but unfortunately without further story taking, it's impossible to suggest any meaningful diagnoses. ...Read more

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I was having cough for three weeks so advised chest X-ray , which showed cyst in diaphragm. Further i got cat scan but it was clean. What should I do.

I was having cough for three weeks so advised chest X-ray , which showed cyst in diaphragm. Further i got cat scan but it was clean. What should I do.

What does Doc say?: Please discuss this with your physician. There may have been a lucent area near your diaphragm, sometimes called a lung cyst, bleb or bulla. Without the x-ray it is hard to know. If definitely benign or stable when compared to an old x-ray, further workup may not be necessary. However, if there are any symptoms or concerns, chest ct is more sensitive, specific and accurate than chest x-ray. ...Read more

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Numbness, tingling and spasms to right side of face. Had 3 seizures cat scan, X-ray and MRI clear what is the cause? (been put on keppra (levetiracetam) for seizures)

Numbness, tingling and spasms to right side of face. Had 3 seizures cat scan, X-ray and MRI clear what is the cause? (been put on keppra (levetiracetam) for seizures)

Have the MRI checked: If yuor MRI was not read by a neuroradiologist or done on a high field MRI machine it might need to be repeated. Usually the test should be done with and without an injection of safe gadolinium based contrast. If your doctor is happy with the quality of the test then you might need to see a neurologist as well if you have not already. ...Read more

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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

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Can you explain results of chest X-ray led 2 cat scan, which led 2 pet scan. results are multiple nodules. what causes lung nodules?

Can you explain results of chest X-ray led 2 cat scan, which led 2 pet scan. results are multiple nodules. what causes lung nodules?

Multiple: There are many causes for pulmonary nodules, which can be broken down into benign or malignant. There are a large number of causes for benign nodules, and 95% of nodules seen on CT scan are benign. If the nodule is large enough, a biopsy may be recommended. The initial move is to see if the same mass was present on a previous scan. PET scans are used to add information, but should not be done firs ...Read more

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Night sweats , shortness of breath , chest pain , hot flashes , can this be Tb? Pleuritis ? Costochondritis ? Had a cat scan and X-ray nothing showed

See Doctor: Pleuritis at your age is rare. Costochondritis is a possible and common cause of chest pain in young people but it does not explain the hot flashes, night sweats and shortness of breath. TB is very rare in this country but if you have been exposed you may want to make sure you're in the clear. You may want to see your primary care physician for a workup. ...Read more

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Had 2 chest x-rays. Both showed a bulky helium. Could you tell me what this could mean. I am waiting for an appointment for a cat scan.

Had 2 chest x-rays. Both showed a bulky helium. Could you tell me what this could mean. I am waiting for an appointment for a cat scan.

Enlarged hilum: An enlarged hilum seen on chest xray could be due to enlarged of abnormal lymph nodes(tb, malignancy) or enlarged structures such as an artery. Many times, however, the chest ct scan shows there is no significant abnormality when the chest film suggests an abnormally prominent hilum. ...Read more

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Will various x-rays and one cat scan in small child cause cancer?

Will various x-rays and one cat scan in small child cause cancer?

Probably not: Although all radiation is cumulative, diagnostic x-rays fall well within the safe level. If x-rays or cat scans are diagnostically necessary, the chance of damage from not being able to visualize the problem is much greater than the chance of damage from the necessary diagnostic modalities. ...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?

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 am have sharp pains on my right side around my hip bone especially during sex or any kind of work I have had cat scan and x rays done but no results

I am have sharp pains on my right side around my hip bone especially during sex or any kind of work I have had cat scan and x rays done but no results

Get reassurance from: Your dr. Your pain could be from muscle or inguinal strain, arthritis, unconventional or convoluted sex position (just guessing?) etc. Motrin or tylenol (acetaminophen) may help in the meantime. Have fun and more of it! ...Read more

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I’ve had 2 cat scans of the abdomen possibly 3 CT scans I can’t remember .3 X-rays plus dental X-rays and mammograms since age 40. nervous about Radiation. How much is too much? When will cancer develop? This is all within the last 20 years. Scared!

I’ve had 2 cat scans of the abdomen possibly 3 CT scans I can’t remember .3 X-rays plus dental X-rays and mammograms since age 40. nervous about Radiation. How much is too much? When will cancer develop? This is all within the last 20 years. Scared!

Radiation Exposure: The dosages that are used for diagnostic imaging are very low and should have no long term effects on your health. With modern sensors or film, the dosage administered is considerably less than years past and lead shielding limits the exposure to the areas needing imaging. Better chance that you will benefit from a proper diagnosis than be harmed by the diagnostic radiation. ...Read more

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7 months of bladder infections. Taken k flex, amoxicillin, penicillin, bactrim, (sulfamethoxazole and trimethoprim) now on Macrobid for 17 days CAT scan x rays ultrasound normal help?

7 months of bladder infections.  Taken k flex, amoxicillin, penicillin, bactrim, (sulfamethoxazole and trimethoprim) now on Macrobid for 17 days CAT scan x rays ultrasound normal help?

Too many; c a Urolog: At your age, I think that's too many bladder infections. Something underlies these recurrent infections: something that antibiotics alone can't fix. While the CT scan & imaging test show that u (or some1) is concerned, they r the wrong tests. What u need is a cystoscopy by a Urologist (looking @bladder with a scope). If it's neg, a voiding cystourethrogram (VCUG) wd be the type of CT scan to get. ...Read more

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What's the risk for fetus after I am doing X-ray and CT scan?

What's the risk for fetus after I am doing X-ray and CT scan?

Unclear: There are multiple variables in determining the risk to fetus. The risk depends on the age of the fetus. The fetus is most suspective to damage in the first trimester. X-rays and ct exams taken far away from the wombs such as the head or extremities actually provide little to no radiation to the fetus. It is common procedure to cover the womb with lead if there is any chance of pregnancy. ...Read more

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