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Doctor insights on: Brain Ct Scan Without Contrast

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Dr. Bernard Seif
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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Can CT scan without contrast show any brain tumors?

Can CT scan without contrast show any brain tumors?

Sometimes: Brain swelling, hemorrhage and mass effect can be noted on a head ct without contrast. Also, some tumors have calcification a which can be seen in a head ct. Smaller and lower grade tumors can sometimes be missed on a head ct without contrast. ...Read more

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Can a CT scan without contrast dye detect brain tumours?

Can a CT scan without contrast dye detect brain tumours?

Should do it: If a brain tumor is causing significant symptoms, it should surely be large enough to be detected on a cat scan. ...Read more

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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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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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Can a negative ct scan without contrast of the head miss a brain tumor causing headaches?

Can a negative ct scan without contrast of the head miss a brain tumor causing headaches?

Yes, it can: Did you go to an ER with H/A & they did a knee-jerk don't-sue-us CT scan which was normal? If you've had H/As for at least 3 years, the chances of finding a tumor on brain imaging are no greater than for someone with no history of H/A. Are your headaches of recent onset, relentless & worsening? If not, you can find something else to worry about, like the outcome of the 2016 presidential election. ...Read more

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Had a fear of brain tumor for 7 months. Ct scan without contrast was clean. Would I be having severe symptoms by now if it was malignant?

Had a fear of brain tumor for 7 months. Ct scan without contrast was clean. Would I be having severe symptoms by now if it was malignant?

Brain tumors aren't easily categorized into benign or malignant: Although the most aggressive type of brain tumor, glioblastoma, would likely be causing severe symptoms by now, there are other types of brain tumors that can be serious but not grow as quickly. The majority, however, would be associated with progressive symptoms during this time period. An MRI is the best test to evaluate potential masses in the brain. ...Read more

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Would a CT scan without contrast show a brain tumor or evidence one was there? What are the chances it won't? Doc not concerned but my anxiety is :/

Would a CT scan without contrast show a brain tumor or evidence one was there? What are the chances it won't? Doc not concerned but my anxiety is :/

See long answer: Ct without contrast is largely indicated for acute hemorrhage or infarcts. It may not show more subtle tumors. Mri with contrast is much more sensitive in the correct clinical situation. Talk to your dr. To see if further imaging evaluation is appropriate. ...Read more

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What does a CT scan of the brain without contrast show?

What does a CT scan of the brain without contrast show?

Some things: CT scan of brain without contrast shows basic anatomy of brain, gray white matter differentiation, ventricles, and physiologic calcifications. Ventricles enlarged/ hydrocephalus, mass effect with displacement of normal structures, some bleeding, abnormal calcifications in tumors or old subdural hematomas, fractures. CT with contrast adds enhancement of certain lesions not seen, hyper/hypo vascular. ...Read more

Dr. Kathryn Ko Dr. Ko
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Would swelling of brain tissues from brain tumor be shown on a non contrast CT scan?

Dr. Kathryn Ko Dr. Ko
1 doctor agreed:
Would swelling of brain tissues from brain tumor be shown on a non contrast CT scan?

Yes: It is possible to see brain swelling from tumor on non contrast CT. FYI there are better modalities to test for this such as MRI. ...Read more

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Non contrast CT scan show growing brain tumor, what is wrong?

Non contrast CT scan show growing brain tumor, what is wrong?

Need more evaluation: It is very difficult to diagnose a brain tumor on a non-contrast ct scan. I would recommend getting a brain MRI with contrast (called gadolinium). Mri takes a much better look at the brain than does ct. ...Read more

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Can anyone of you drs give me a website link of a CT scan with contrast showing a brain tumor?

Can anyone of you drs give me a website link of a CT scan with contrast showing a brain tumor?

Johns Hopkins site: Http://www. Hopkinsmedicine. Org/neurology_neurosurgery/specialty_areas/brain_tumor/diagnosis/how-to-diagnose-brain-tumors. Html

and here's a nice scan of a tumor as well. ...Read more

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If CT scan w&wo contrast came back normal with no brain tumor found 2 years and 7 months ago what's my risk to have one now if I have new symptoms?

If CT scan w&wo contrast came back normal with no brain tumor found 2 years and 7 months ago what's my risk to have one now if I have new symptoms?

It depends: It all depends on what kind of tumor was identified over two yrs ago. New symptoms strongly suggest that you need new studies. You should consult your neurologist or primary care m d. An MRI is more sensitive for soft tissue problems then a ct. ...Read more

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Last question I promise 2 years and 7 month ago I got a CT scan with and without contrast and it was clear? D I need to still worry about brain tumor

Last question I promise 2 years and 7 month ago I got a CT scan with and without contrast and it was clear? D I need to still worry about brain tumor

Most: 23 year old men do not need a head ct +/- contrast in the first place, and the exposure from the radiation when you do not need a scan is not worth repeating. Imaging is expensive and should only be done when necessary. You provide no information suggesting either ct or MRI is indicated. ...Read more

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2 years and 8 months ago CT scan w&wo contrast ruled out a brain tumor now im worry again can a brain tumor grow that fast and cause symptoms im 27?

2 years and 8 months ago CT scan w&wo contrast ruled out a brain tumor now im worry again can a brain tumor grow that fast and cause symptoms im 27?

Brain tumor: It is possible but is very unlikely. Specially if the symptoms you have now are the same you had 2 1/2 years ago. Discuss your symptoms with your doctor. He may be able to determine what is the problem causing your symptoms and relief you level if anxiety. ...Read more

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What are the odds that a CT scan with and without contrast missed a brain tumor?

What are the odds that a CT scan with and without contrast missed a brain tumor?

Brain tumor: The odds are not very high but if concerns persist that something could have been missed, a brain MRI with contrast is recommended. ...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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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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If a head CT scan with and without contrast ruled out brain tumor can I be sure that I don't have a brain tumor?

Why do you worry?: Cat scan is adequate to demonstrate even a modest size lesion, and seems reassuring. Yet, you remain focused and perhaps doubtful. Urge you contact a counselor and explore the underlying causes of your persistent concerns. Actually brain tumors are quite uncommon. ...Read more

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Would a Brain MRI W/O Contrast & a CT Scan with and W/O Contrast show a brain tumor causing symptoms? Worried that it could have been missed.

Would a Brain MRI W/O Contrast & a CT Scan with and W/O Contrast show a brain tumor causing symptoms? Worried that it could have been missed.

MRI: A MRI with contrast is sufficient to detect evidence of a brain tumor. If there is any question as to whether a brain tumor is present or not, one can opt to repeat the MRI of the brain with contrast three months after the last MRI brain was obtained. ...Read more

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Would a Brain MRI without Contrast & a CT Scan with and without Contrast show a brain tumor causing symptoms? Worried that it could have been missed.

Would a Brain MRI without Contrast & a CT Scan with and without Contrast show a brain tumor causing symptoms? Worried that it could have been missed.

No symptomatic tumor: It is a pretty safe bet that MRI together with contrast CT can exclude a symptomatic tumor (mass) in the head. That does not mean all causes of headache or neurologic complaint are seen. Only your practitioner can give more advice to "put your mind at ease" and further direct your diagnostic journey. ...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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If im in the ER and they wanna check for a brain tumor by doing a CT scan. Can I request an MRI without contrast instead or is that not an option?

Yes/No: A ct scan has the advantage of being fast (and cheap from the insurance companies standpoint) and gives a good enough resolution as a screening test. You can request an MRI without contrast, however, if something is found, you need to get another MRI scan which is a longer, and more expensive, time commitment. ...Read more

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Do CT scan/mri's when they check for tinnitus require contrast? Will they check all the vessels in my brain? Or is it just normal mri?

Do CT scan/mri's when they check for tinnitus require contrast? Will they check all the vessels in my brain? Or is it just normal mri?

Contrast is expected: Brain scans (mri or ct) looking for tumors or aneurysms frequently use contrast. Since causes of tinnitus include these possibilities, I would anticipate the use of contrast. ...Read more

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I recently had a Head and Neck CT scan. One without and one with contrast. What are the chances a brain tumor causing symptoms was missed?

I recently had a Head and Neck CT scan. One without and one with contrast. What are the chances a brain tumor causing symptoms was missed?

Very remote: CT scan will pick up a brain tumor easily although it is not the best test for small (tiny) tumors. But then you would not have any symptoms from a small lesion. Please share information about your symptoms with us....we like to have detailed history of what is bothering you to start with. ...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