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Doctor insights on: X Ray Or Cat Scan

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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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My ride side under ribs has pain that goes to the back. Went to the ER and blood tests, ultrasound, x-ray, and cat scans came back negative. Thoughts?

My ride side under ribs has pain that goes to the back. Went to the ER and blood tests, ultrasound, x-ray, and cat scans came back negative. Thoughts?

Could be gallbladder: Your gallbladder lives just under your right ribcage; pain often radiates to the right shoulder, right armpit - but i've seen it radiate to the back, too. While gallbladder stones will show up on an ultrasound, sludge may not. The test that looks at the efficiency of the gallbladder's emptying is a hida scan - and it isn't typically done within the scope of an er visit. Talk to your doctor. ...Read more

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Besides x-rays and cat scans to check for brain damage, can a doctor go any type of surgery for a cracked skull?

Besides x-rays and cat scans to check for brain damage, can a doctor go any type of surgery for a cracked skull?

Unless: The skull fracture is depressed, exposed to the air, or pushing on the underlying brain the usual course of action is to do nothing and let the skull heal. As you mentioned, the real issue is whether the underlying brain was damaged. ...Read more

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Why does the infection keep spreading? Tooth extraction @ 6 weeks ago of upper left molar. Infection has spread despite taking a lot of antibiotics. X-rays and cat scan were taken and nothing found. Now there is a quarter sized bruise on the cheek and

Why does the infection keep spreading? Tooth extraction @ 6 weeks ago of upper left molar.  Infection has spread despite taking a lot of antibiotics.  X-rays and cat scan were taken and nothing found.  Now there is a quarter sized bruise on the cheek and

I : I don't have the advantage of seeing you or your ct scans, but this sounds like a possibility might be buccal space cellulitis. Is there any fever, warmth, pain, or redness to the cheeks? It's odd you haven't responded to an appropriate course of antibiotics. The addition of a short-term course of steroids may help you with the swelling. I would think that consultation with an infectious disease specialist would be appropriate in this setting. ...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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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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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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Having constant abdominal pain.Went to ER .And I have a high white cell and liver enzyme count.I had x-rays cat scan blood work /urinalysis -no answer?

Having constant abdominal pain.Went to ER .And I have a high white cell and liver enzyme count.I had x-rays cat scan blood work /urinalysis -no answer?

Ultrasound?: (right upper) abdominal pain, elevated liver enzymes & white count are suggestive of a gallbladder attack. Ct scans are pretty comprehensive tests but an ultrasound is actually better for seeing gallstones. Regardless of the cause, if your pain is constant, you need medical follow-up sooner rather than later. Hope you feel better. ...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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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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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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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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Is it possible have something missed on an x-ray, mri, CT scan etc?

Is it possible have something missed on an x-ray, mri, CT scan etc?

Missed Diagnosis: Yes, it is possible that a diagnosis was missed on your x-ray, ct or mri. Radiologists are just like all other humans and can, unfortunately, occasionally make mistakes. If there is concern, consider asking your doctor to discuss the examination personally with the radiologist who interpreted the exam and then to discuss those results with you. ...Read more

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What to do if I have something missed on an x-ray, mri, CT scan etc?

Inform physician: Radiologists trained in imaging from residencies and fellowships usually read imaging studies. They are usually peer reviewed to avoid making errors. However they are human and can make errors.Error rate is usually universally about 3-4%. In order to improve performance of medicine providers need to be informed. In imaging as in medicine there are gray areas and everything is not black and white. ...Read more

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Possible for a 6.6mm tumor to not show up on X-ray or CT scan?

A cm is: Roughly a half-inch, so 6.6 is a little more than half that and quite easy to not been seen on ct, and unlikely to be seen on a plain film...And I am speaking of chest. Abdomen or pelvis even easier to miss. ...Read more

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Please tell me the difference among x-ray, CT scan and mri?

The short story...: Xrays are images obtained by passing a beam through a detector to simply generate and image of which xrays did or didn't hit the detector. Ct uses the same technology but reconstructs multiple imaging points using a computational algorthim to make a much more detailed picture in the form of "slices" mri uses magnetic fields and radio waves to generate and image using computers to create images. ...Read more

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Can having a CT scan 4 days after having an X-ray increase your chance for cancer?

See below: All x-ray exposure increases your chances of developing cancer.For any test involving radiation exposure, the question is one of risk vs benefit. If there's a compelling reason/question that's prompting the scan then it's likely worth proceeding but no one should be getting scans without a good reason. If you are unclear on your doctor's thinking, ask. Then you can decide if you want the scan done. ...Read more

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How is slipped rib/:floating rib syndrome diagnosed? Does it show up on X-ray or CT scan?

History and exam: Everyone generally has at least one floating ribs some have a couple on each side though usually the lower ribs. They can get irritated on your hip or on the ledge of a couch when you're leaning or a variety of other things. They are slow to heal. Sometimes you can feel them slip underneath another rib. That is uncomfortable. There's a lot of carlatun these ribs which is slow to heal. Even chest x-rays are not very helpful. Sometimes diagnostic nerve block can define things. ...Read more

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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

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How much cost/how much radiation on new CT scans would Coronary Calcium Scan be on the whole body? Could this be done with new tech X-ray and no CT?

How much cost/how much radiation on new CT scans would Coronary Calcium Scan be on the whole body? Could this be done with new tech X-ray and no CT?

Very small amount: However, a coronary calcium scan should only be done in the presence of intermediate or high risk of having coronary artery disease, Asymptomatic individuals without at least 3 risk factors for coronary artery disease (Diabetes, Hypertension, tobacco use, elevated cholesterol, Obesity, etc.) have a very high likelihood of having a falsely positive scan, thus rendering an abnormal scan unreliable. ...Read more

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Ct scan showed lower atelectasis and swelling around appendix. No one mentioned the atelectasis. Have seen it on past X-ray. Never mentioned to me why?

Ct scan showed lower atelectasis and swelling around appendix. No one mentioned the atelectasis. Have seen it on past X-ray. Never mentioned to me why?

If it was a very: small region of Atelectasis or scarring it may not have been felt to be clinically significant, but without seeing the images it is impossible to say for sure. You can ask your doctor about it if you are concerned. ...Read more

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Whats the difference between an chest X-ray and CT scan?

Both use x-rays: A chest ct is a very detailed look at the lung, blood vessels, heart and bony thorax. It takes very thin (3-5mm) slices which allows for detailed analysis of lung structure. The chest x-ray takes a 3-d structure and collapses it to 2-d. This still provides very detailed information of the chest, but can lead to overlap -- sometimes requiring additional views or a ct scan to clear things up. ...Read more

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