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Doctor insights on: Brain Ct Scan Without Contrast

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Dr. Barbara Lavi
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

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

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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Dr. Michael Gabor
1,852 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