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Doctor insights on: Will A Brain Aneurysm Show Up On A Plain Ct Scan Of The Head

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Will a brain aneurysm show up on a plain CT scan of the head?

Will a brain aneurysm show up on a plain CT scan of the head?

USUALLY NOT: Since aneurysms are a 'defect' in the arterial system --they can really only be seen with a contrast ct study (angiogram) or a mra (mri-angiogram). One time i did have a patient with a leaking brain aneurysm which the effects of which were barely visible on ct but confirmed on mra--and she made it! ...Read more

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Dr. Corey Clay
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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 for a CT scan of the head *without* contrast to show an unruptured brain aneurysm?

Is it possible for a CT scan of the head *without* contrast to show an unruptured brain aneurysm?

It is: possible, but not probable. The aneurysm would have to be relatively large, and even then the noncontrast appearance may not be specific. ...Read more

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Will a head cat scan show a brain aneurysm?

Will a head cat scan show a brain aneurysm?

Sometimes: If an aneurysm is large, and especially if there are calcifications in the wall of the vessel, it can be seen on ct. However, angiography with a ct (dye in vessels, looking at the vessels themselves) is better test. Mrangiography is also sometimes useful, certainly better than simple ct done without contrast. ...Read more

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Can I ask my doc to change my ct scan for my head to with contrast to alleviate my severe fear of brain aneurysm?

Can I ask my doc to change my ct scan for my head to with contrast to alleviate my severe fear of brain aneurysm?

Yes: You can certainly ask about it. Rather than specifically requesting contrast though, I'd suggest asking about the potential benefits vs risk of a contrast study as opposed to the non-contrast. The appropriateness of contrast depends on the reason the study is being ordered. Contrast helps enhance detection of many findings but can obscure others. ...Read more

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Does a CT scan rule out brain aneurysm? 6 months pain behind right ear and upper neck with dizziness/blurred vision. CT normal. What to do next?

Does a CT scan rule out brain aneurysm? 6 months pain behind right ear and upper neck with dizziness/blurred vision. CT normal. What to do next?

No: A brain aneurysm is a vascular structure that will not be detected by a plain CT scan. You would need to have an MRI/MRa. I suggest you see a neurologist for your symptoms and then get the appropriate test he/she orders. ...Read more

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Can a CT scan of the head without contrast dye detect brain aneurysms?

Can a CT scan of the head without contrast dye detect brain aneurysms?

Yes: While plain ct scan is not the best test for aneurysm, large aneurysms can potentially be spotted. Mri is a better test, especially when blood vessels are looked at as well. ...Read more

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Can CT scan without contrast show brain aneurysm?

Can CT scan without contrast show brain aneurysm?

Unlikely: Ct scan without contrast is unlikely to show an aneurysm unless it is very large and is calcified. A ct angiogram is a better study to visualize an aneurysm. ...Read more

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I did a ct scan with iodine would that show an unruptured brain aneurysm ?

I did a ct scan with iodine would that show an unruptured brain aneurysm  ?

Maybe: Depending on the size and location of the aneurysm, it can be detected with a CT scan with iodine. However, brain aneurysms are detected more frequently and with smaller sizes with CT or MR angiography techniques. ...Read more

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Will a ct scan show whether I have a brain aneurysm?

Will a ct scan show whether I have a brain aneurysm?

Yes: Has to be a CTA (CT angiogram). CT scan of the head without contrast doesn't detect aneurysms unless they are larger. CT scan of the head with contrast has a slightly better chance. CTA of the head is good for seeing aneurysms. See radiologyinfo.org and stroke association.org for more details. ...Read more

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Can i develop a brain aneurysm just 6 months after a normal CT scan?

Can i develop a brain aneurysm just 6 months after a normal CT scan?

CT didn't show it: Most likely you had your aneurysm all along - the ct scan simply did not show it. Cts do not detect brain aneurysms for the most part. Only specialized tests do (cta, mra, dsa). Discuss with your neurosurgeon. ...Read more

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Ct scan dects brain aneurysms? Is it possible for a CT scan without contrast to reveal an unruptured brain aneurysm? Is the test meant to find that sort of thing?

Ct scan dects brain aneurysms? Is it possible for a CT scan without contrast to reveal an unruptured brain aneurysm? Is the test meant to find that sort of thing?

NOT THE BEST WAY: Mri with contrast will pickup most large aneurysms over the blood vessels of the brain, and a cat angio or a magnetic resonance angio would be used to find smaller aneurysms. Standard cat not usually successful. ...Read more

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Are frequent nosebleeds a sign of brain aneurysm?I have nosebleeds and I'm curious.I also have lots of headaches and have recently had a cat scan

Are frequent nosebleeds a sign of brain aneurysm?I have nosebleeds and I'm curious.I also have lots of headaches and have recently had a cat scan

Not aneurysm: You may have a bleeding tendency which your physician could work up, or you may just have a plexus of veins in your nose that an otolaryngologist could fix. It's not a brain aneurysm. ...Read more

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Can a CT scan detect brain aneurysms?

Can a CT scan detect brain aneurysms?

CT angiogram: A regular ct scan might detect a large aneurysm with calcium. A test that is designed specifically to look for aneurysms is the ct angiogram. With this test contrast goes into the vessels of the brain. If there is an aneurysm that is larger than 2 mm, it should be detected with this technique. ...Read more

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What are the side effects of an unruptured brain aneurysm and how can I tell if my CT with iodine scan failed to show any signs of an aneurysm ?

A small: Aneurysm generally won't cause any symptoms. A larger aneurysm could cause symptoms based on its location and what structures it is pressing on. Presumably the radiologist would have diagnosed an aneurysm if it was visible on CT, but unless the CT was specifically tailored to look for an aneurysm(CTA), a small aneurysm might not be visible on a routine CT. ...Read more

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If a CT scan determined you have no brain anuerysm, can you still develop one soon after ?

If a CT scan determined you have no brain anuerysm, can you still develop one soon after ?

No: Aneurysms are weakness in blood vessels. Smoking, hypertension and collagen disorders can predispose to them. They take years to develop. A regular ct scan may miss them so if there is suspicion the gold standard is a digital subtraction angiogram. You probably had a negative ct angiogram and probably a followup cta is ok if your surgeon/neurologist feels it's important to exclude. ...Read more

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Does a CT scan without dye detect an unruptured brain anuerysm?

Does a CT scan without dye detect an unruptured brain anuerysm?

Not likely: Most intracranial vascular anomalies, including aneurysms, require IV contrast to be seen on ct head. However, ct without contrast is 90% sensitive for intracranial bleeding. The risks of IV contrast for ct include kidney injury and allergy to contrast dye. Good luck! ...Read more

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Brain aneurysm coiled year ago. 3 MRA scans show occlusion.Worried walking my dog,incase a football should hit me on the head would it cause problem?

Brain aneurysm coiled year ago. 3 MRA scans show occlusion.Worried walking my dog,incase a football should hit me on the head would it cause problem?

Brain aneurysm: Not to worry. The aneurysm is occluded and not at risk for rupture. After one year the risk for compaction of the coils and recurrence of the aneurysm is exceedingly low. The coils are MRI compatible so you can have MRI scans too. ...Read more

Dr. Michael Gabor
1,836 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


Dr. Abhineet Chowdhary
337 doctors shared insights

Brain Aneurysm (Definition)

A medical condition in which there is an outpouching of the wall of the blood vessel that supplies the brain. The most serious consequence of this outpouching is that the wall is weakened and can rupture, leading to massive ...Read more