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Doctor insights on: Brain Tumor Ct Scan

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Dr. Evan Altman
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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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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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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?

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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Is smelling smoke a symptom of a brain tumor a myth? Had CT scan 2 years ago for phantom smells. Everything normal. Now constant smell of smoke x2 days. Dry sinuses? No other neuro symptoms.

Is smelling smoke a symptom of a brain tumor a myth? Had CT scan 2 years ago for phantom smells. Everything normal. Now constant smell of smoke x2 days. Dry sinuses? No other neuro symptoms.

See your PCP: Myth, or no myth, it warrants further investigation. Smelling unusual smells that aren't present like smoke is not normal. So the first person to start a dialogue with is your pcp. S/he will be able to advise you further, and provide a referral to see a neurologist, if that's needed. Right now it needs to be documented, especially if you're smelling it full-time. ...Read more

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Can a CT scan also scan for brain tumors? I had a CT scan done a while ago to check my sinuses, but now i fear i may have a brain tumor. I was wondering if a doctor could look at the same CT scan to check for brain tumors.

Can a CT scan also scan for brain tumors? I had a CT scan done a while ago to check my sinuses, but now i fear i may have a brain tumor.  I was wondering if a doctor could look at the same CT scan to check for brain tumors.

Probably not.: A ct of the sinuses wouldn't get much of a look at the brain. An MRI of the brain would be the best test for a brain tumor. Of course i don't know anything about you, but fearing you have a brain tumor is often separate from actually having one, fortunately. ...Read more

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Ct scans good for catching brain tumors? I did a CT scan several months ago because i was having head and neck pain. The CT scan turned out to be normal, but the head and neck pain have returned. I was wondering what the odds are that the CT scan missed

They aregood: Mri are better more sensitive as are ct with contrast or pet enhanced plain ct 83% sensitive congrats on normal ct . This should reassure you along with symptoms which come and go symptoms that go most neck pain is muscular and stress related with associated headaches common tension symptoms brain tumor is far down on the list when you hear hoof beats they are probably not zebras. ...Read more

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Can a CT scan find a brain tumor?

Can a CT scan find a brain tumor?

Brain tumor: Some kinds of tumors are better diagnosed by ct and some by mri. Are you having issues with headaches, etc? You should see a doctor if you have any symptoms that make you worry about brain tumor. ...Read more

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Could CT scan cause a brain tumor?

Could CT scan cause a brain tumor?

Rare: Many ct scans of the head can theoretically cause brain cancer several years later. See radiology physicist at your hospital to calculate your dose and risk if you had many head ct scans. ...Read more

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What happens if my CT scan didn't show the brain tumor?

What happens if my CT scan didn't show the brain tumor?

MRI: Mri with and without contrast is more sensitive for detecting tumors that ct is. ...Read more

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What's the likelihood of a CT scan missing a brain tumor?

What's the likelihood of a CT scan missing a brain tumor?

Depends: If done without contrast, it could be missed. If the tumor is in the posterior fossa (back of brain or brainstem) could be missed. With a ct scan, the bones in the back of the head commonly cause artifact and a mass could be missed. If there is a concern, then a MRI with gadolinium should be performed. But a ct scan with contrast is a good study. Hope this helps. ...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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Ct scan did not show brain tumor. Does that mean i'm in the clear?

Ct scan did not show brain tumor. Does that mean i'm in the clear?

No: Mri of the brain with gadolinium [contrst medium] may need to be performed... Before ruling out that you do not have brain tumor... ...Read more

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What kind of brain tumor would not show up on a CT scan? Why would it not be seen?

What kind of brain tumor would not show up on a CT scan? Why would it not be seen?

Many: Many types of brain tumors do not show up on ct scans, especially if it was done without IV contrast because they can look the same as normal brain tissue. Mri with and without gadolinium contrast is the best way to evaluate the brain for a tumor. ...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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Can a CT scan miss a brain tumor?

Can a CT scan miss a brain tumor?

Yes!: I have seen this happen occasionally when brain tumors occur in the back part of the brain (posterior fossa) where the ct scan can be distorted by the bones. It is rare, however. ...Read more

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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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Neoplasms (Definition)

"tumor" literally translates as "mass", so even a fresh bruise could be called a "tumor". Doctors use the term "neoplasm" (tranlates literally as new growth) to describe tumors that are abnormal growths of cells. These may be benign or malignant; "malignant" = cancer. In everyday usage, we use "tumor" ...Read more


Dr. Michael Gabor
1,920 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