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A 47-year-old member asked:

how are mr scan and a ct scan different?

1 doctor answer1 doctor weighed in
Dr. Piotr Obara
Radiology 14 years experience
Contrast difference: Ct uses a combination of xrays shot from multiple directions to look at differences in tissue density. Mri uses strong magnetic fields instead of xrays to differentiate tissues and gives much better contrast than ct. Ct is typically used in the acute setting to see if there is blood or major abnormalities. Mri is a more specific exam to differentiate abnormalities such as stroke or tumor.

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A 20-year-old member asked:

What does acat scanshow?

4 doctor answers7 doctors weighed in
Dr. Gregory Hines
Family Medicine 24 years experience
It depends: It depends on what part you are examining. A brain ct scan scan show tumors or bleeding, while an abdominal ct scan can show infections such as diverticulitis or obstructions such as small bowel volvulus.
A 21-year-old member asked:

What is computerized tomography (ct)

2 doctor answers6 doctors weighed in
Dr. Paul Cohen
Family Medicine 28 years experience
Imaging...: A 'ct' scan is a very sophisticated imaging procedure designed at taking detailed pictures of one's bodies; to help the doctors better pinpont the causes of what ails you.
A 31-year-old member asked:

What is a cat scan?

1 doctor answer1 doctor weighed in
Dr. Gregory Hines
Family Medicine 24 years experience
Computed Tomography: Ct scans are special xray tests to look inside the body to look for things such as cancer, abdominal or thoracic infections, or strokes in the brain.
A 32-year-old member asked:

Which are the limitations of CT scanning of the head?

3 doctor answers5 doctors weighed in
Dr. Marcel Hungs
Neurology 26 years experience
Low resolution: A ct has advantages and disadvantages: a ct is cheap, fast done and gives a great information about blood, bone and calfifications. However, it is done with x- ray, and has low resolution of tissue such as the brain. An MRI might be at time better, depending on the goal of the exam.
A 41-year-old member asked:

What's the difference between CT scanning and pet scanning?

4 doctor answers8 doctors weighed in
Dr. Felix Brizuela
Neurology 32 years experience
Radiation: Pt scan uses radioactive glucose that is injected. The glucose is taken up by organs for energy, and we measure how active the tissue is. Dead tissue, like a stroke takes up no glucose. Cancer takes up too much. Ct only takes a picture.

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Last updated Jan 10, 2014

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