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Doctor insights on:
Difference Between Pet Scan And Ct Scan
1
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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Pet Scan (Definition)
Pet scans most often use a radioactive form of glucose, the energy source for most of the cells in our bodies. The pet scanner can detect and measure how much of the radioactive glucose analog, f-18 fdg, is in a particular organ or region. The areas using more glucose are hyper metabolic and generally more worrisome. Our brains and sometimes hearts prefer glucose as food, making ...Read more
2
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
3
What is the difference between normal CT and pet CT scan?
Nuclear study: Ct radiographic examination by itself is usually more detailed with higher resolution utilizing intravenous contrast material to help differentiate soft tissue abnormalities such as lymph nodes from vascular structures. Ct combined with pet, is low resolution but helps define areas of increased radiotracer uptake of isotope f18 fdg, glucose metabolite, by allowing anatomic localization. ...Read more
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4
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
5
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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6
What is the difference between a cat scan and pet scan?
Anatomy / metabolism: CAT scan utilizes xrays for determination of anatomical structures in multiple planes coronal, sagittal, and transaxial. PET scan uses radioactivity with tracer FDG 18 a glucose metabolite to show metabolic areas . Usually malignant lesions are most active. Small metastatic lesions can be detected. Sometimes compared with anatomy with PT CT. ...Read more
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7
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
8
Whats the difference between an MRI scan and an mrcp scan?
MRI: An MRI scan is a general and broad term used to describe an MRI performed of a body part (head, abdomen, pelvis, wrist, etc.). An mrcp (magnetic resonance cholangiopancreatography) is a type of MRI scan that focuses on the pancreas, bile ducts, gallbladder, and liver). ...Read more
9
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
10
What is the difference between a pet scan and a CT scan?
Metabolism / Anatomy: A pet scan is an image study that assess glucose metabolism for different tissues in your body using gamma photons while a ct scan is an anatomic picture of your body that reveals size, shape and intensities of organs using x-rays. Pet scans have several indications, including: cancer, cognitive disorders and heart perfusion stress and viability. ...Read more
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11
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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12
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
13
What is the difference between an MRI scan and a CT scan?
MRI vs CT: MRI creates images from manipulation of strong magnetic fields, CT uses ionizing radiation just like xrays. CT is much faster and allows for a large survey of parts of the body. MRI is more suitable for evaluating more specific tissues (heart, brain, joints) Each has their own advantages & disadvantages and largely depend on what is being assessed. Always confer with a radiologist! ...Read more
14
What is the difference between an MRI scan and a CT scan?
MRI vs CT: MRI creates images from manipulation of strong magnetic fields, CT uses ionizing radiation just like xrays. CT is much faster and allows for a large survey of parts of the body. MRI is more suitable for evaluating more specific tissues (heart, brain, joints) Each has their own advantages & disadvantages and largely depend on what is being assessed. Always confer with a radiologist! ...Read more
15
What is the difference between a pet scan & a CT scan?
Metabolism & Anatomy: A pet scan is use to evaluate metabolic processes in your body. Currently pet scans are most commonly use to evaluate the glucose metabolism to assess the activity of neoplasms by capturing gamma photons . For this purpose a radioactive form of sugar is injected in the patient. In ct scans external x-rays are use to produce an anatomic image of the body to evaluate size, shape, etc. ...Read more
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16
What's the difference between an angiogram and CT scan?
A CT scan: Is performed without and/or with intravenous contrast/dye and evaluates the entirety of the body part being imaged. An angiogram is performed with intravenous contrast and directly evaluates the blood vessels. ...Read more
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17
What is the difference between pipida scan and hida scan?
None: Both tests the same: gallbladder function, but use different trace material. ...Read more
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18
What is the difference between CT and MRI scan?
Mechanism: Mri is based on the spin-spin splitting of hydrogen atoms inherent to all bodily tissues, namely in the form of water. The raw data produced from an MRI scan must undergo extensive processing to be converted into a "readable" image. Ct scans are essentially fancy x-ray machines which can take "slices" of whatever is being examined (head, abdomen, chest, etc.) unlike mri, ct uses ionizing radiation. ...Read more
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19
Difference betwee bronscopy and CT with contrast?
The: Ct looks for an radiological finding that suggests abnormality and a brochoscopy actually looks at the living tissue with a camera and often takes a biopsy to send for pathology. Ct can be used to get a biopsy as well with a guided needle. ...Read more
20
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
See 1 more doctor answerComputed 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
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
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