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Doctor insights on: Cat Scan Vs Ct

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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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Dr. Jeffrey Stevens
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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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Is orbital CT scan and CT scan sinus the same?

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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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

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Could a CT scan show anything a MRI scan cannot ?

Yes: Some Doctors who interpret MRI exclusively in their practice will promote the idea that MRI is the best imaging technique for every condition. To a lesser extent, some Doctors will say CT. Some doctors swear by Ultrasound imaging. There are strength and weaknesses of each modality, with considerable overlap in information produced. And each modality has some advantage over others. ...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'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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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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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 is the difference between MRI contrast and CT scan contrast ?

What is the difference between MRI contrast and CT scan contrast ?

Not same: Mri contast gadolinium does not contain iodine while ct contrast contains iodine. An allergic reaction to ct contrast does not mean that you will have a reaction to gadolinium during your MRI scan. True allergies to the MRI contrast are exrtremely rare; however, you may still experience some symptoms like feeling lightheaded or nauseated due to the injection. Good luck with the exam! ...Read more

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What's difference between High HD Contrast CT scan vs Normal Chest CT with contrast evaluating interstitial lung markings?

What's difference between High HD Contrast CT scan vs Normal Chest CT with contrast evaluating interstitial lung markings?

Different chest CTs: High resolution chest CT usually with out intravenous contrast is used to define interstitial lung disease pattern, whether diffuse or localized process. CT of chest examination with contrast intravenously usually looking for tumors or metastases and acute infection in the lungs. ...Read more

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What DES an abdominal pelvis cat scan show?

What DES an abdominal pelvis cat scan show?

CT scan: Typically everything in the 'belly' - liver, lower parts of the lung, stomach, pancreas, spleen, adrenal glands, gall bladder, small & large intestines, kidneys, gynecologic structures, bladder, prostate, - & all th muscles & bones in that region. ...Read more

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How much for a CT scan vs mri?

How much for a CT scan vs mri?

About the same: There were appreciable differences in previous years but most facilities charge about $800-1000 for a ct and about $1200-1500 for an mri. It can vary greatly depending on where you have it done. Call ahead and try to negotiate a price. ...Read more

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Is contrast mandatory for abdomen CT scan?

Is contrast mandatory for abdomen CT scan?

No: Iv contrast is often not used when the ct is for the purpose of looking for renal stones and in people with a history of contrast allergy or renal disease. It is often helpful in assessing persons with nonspecific abdominal symptoms as it will better show areas of inflammation, infection, and tumor. ...Read more

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How do a pet scan and a CT scan differ?

How do a pet scan and a CT scan  differ?

Anatomic/physiologic: Pet scan involves intravenous injection of radio tracer usually f18 fdg.Imaging of whole body occurs for localization of areas of increased glucose metabolism. Malignant tumors usually most active.Ct scan involves x-ray and performs anatomic imaging of parts of body usually head, chest, abdomen, pelvis, or extremities. Pet?Ct combines imaging modalities for anatomic localization of areas of uptake. ...Read more

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Does an abdominal CT scan show polyps?

Sometimes: But not usually. Polyps are usually too small, and ct scan does not distend colon adequately. Best test for colon polyps is colonoscopy by gastroenterologist. ...Read more

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Abdominal cat scan showed "homogeneous contrast enhancement", pancreas related, insulinoma?

Discuss with doctor: The description you gave is a little vague. The best thing to do is review the study with your doctor or with the radiologist that read the ct scan. ...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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Lung tumor CT scan with or without contrast?

Lung tumor CT scan with or without contrast?

Either: I usually do them without so I don't expose the patient to the contrast, which can injure kidneys. However, if the tumor is close to the mediastinum, I usually do order it with contrast because it's often difficult to tell the various structures apart without it. It also helps to identify lymph nodes. ...Read more

Dr. Michael Gabor
1,869 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