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Doctor insights on: Ct Scans Vs Cat Scans

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How do pet scans, mri, ct, and bone/gallium scans differ?

How do pet scans, mri, ct, and bone/gallium scans differ?

Different mechanisms: Mri uses magnetic radiation( no x-ray) for anatomic localization and characterization of different parts of body, water and fat constitution of different tissues.Ct uses x-ray to characterize anatomy of body, better for bone than mr.Pet, bone, gallium scans use radio tracers intravenously.Petglucose metabolism of tumors, gallium (infection/tumor), bone scan for fxs, tumors, infection bone metabolism. ...Read more

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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How is pet CT scan done?

How is pet CT scan done?

PET/CT scan: You need to fast for 4 hours first, then you will recieve an injection of a small amount of radioactive glucose (i.e. Sugar). Next you will sit in a recliner chair for about 70 minutes to allow the glucose to distribute throughout you. Then you will lie on your back on the pet/ct scanner (a tunnel shaped machine) for 20 minutes. There are no side effects from the test or restrictions afterwards. ...Read more

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Ct scan, mri, nuclear medicine imaging, ivp scan, how are they different?

Ct scan, mri, nuclear medicine imaging, ivp scan, how are they different?

Quite different: Ct involves xray type radiation with cross sectional imaging in transaxial, sagittal, and coronal projections. Nuclear medicine, internal irradiation either injected intravenously, inhaled, ingested, injected subcutaneously.Ivp uses injection of contrast material for visualization of kidneys and bladder with x-ray. Mr imaging uses no ionizing radiation magnetic fields to generate x-sectional images. ...Read more

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How are pet scans , cat scans, and x-rays different?

How are pet scans , cat scans, and x-rays different?

Anatomy v physiology: Ct / x rays show your body's anatomy . Pet shows the metabolism of the anatomy. ...Read more

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Are suv on pet scan gamma?

Are suv on pet scan gamma?

SUV...: Suv stands for standardized uptake value. It is used for semi-quantitative analysis on pet scan. It tells the amount of glucose uptake or hypermetabolism of a tumor. ...Read more

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What are the differences between pet scans, mri, ct, and bone/gallium scans?

What are the differences between pet scans, mri, ct, and bone/gallium scans?

Anatomy vs Physiolog: Mri and ct scans are typically looking at the anatomy of a patient, as well as differences in blood flow if contrast is administered. Pet, bone and gallium scans are all looking at the function, or physiology of the patient, and the anatomy is of secondary concern. For example, pet scans are usually using f-18 fdg, a glucose analog, and display differences in glucose use, a main energy source. ...Read more

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Could MRI or CT scan detect brain cancer?

Could MRI or CT scan detect brain cancer?

Sure: Mri would be the imaging test of choice, though often we start with a ct. Ultimately, you'll likely need a biopsy to prove it's a cancer. ...Read more

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What is the difference between pet scans, mri, ct, and bone/gallium scans?

What is the difference between pet scans, mri, ct, and bone/gallium scans?

A lot: Sorry to be so vague. They are very different in what can be seen and what can be diagnosed. Not enough room to go through the details. The Internet has many resources for this information. Try this one: http://www.radiologyinfo.org/ ...Read more

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What are the differences among CT scans, MRI scans and myelograms?

Myleogram: Ct myleogram is a better postop test then mrimyleogram invasive contrast in spinal canal MRI noninvasive. ...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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Is orbital CT scan and CT scan sinus the same?

Not quite: The CT of the sinuses focuses in on the sinuses (though the radiation goes through the entire skull) and generally covers the entire set of sinuses (sphenoid, maxillary, frontal, ethmoid). The orbital CT will cover the eye sockets (and those pictures are zoomed in). While the sinuses lies behind the eyes (& so they overlap), the focus & coverage of these scans are slightly different. ...Read more

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Do pet scans show lung cancer?

Do pet scans show lung cancer?

Sort of...: The pet scan non-specifically show very metabolically active (consuming lots of energy), and lung cancer and its metastasis fit that category. It is not specific. Benign conditions like sarcoid can also make pet studies glow very brightly as well. Slow growing lung cancer, broncheoalveolar may not be pt avid. ...Read more

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How are mr scan and a CT scan different?

How are mr scan and a CT scan different?

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. ...Read more

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

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

CT/PET: CT uses X-rays to produce images. The radiation passes through the body into detectors. With PET, a radioactive labelled substance, usually glucose, is injected into the body. Glucose is metabolically active, so PET forms functional images based on areas of high metabolic activity. CT images anatomic structure. Sometimes the 2 are combined, called PET/CT fusion imaging. ...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 scans detect brain aneurysms?

Can CT scans detect brain aneurysms?

Depends: Size and exact location. Some may require angio to demonstrate. ...Read more

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