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What is the difference between an fMRI scan and PET scan?
fMRI (functional magnetic resonance imaging) is a non-invasive brain imaging technique in which an individual lies in an MRI machine. The MRI machine has a magnetic field and a gradient coil which causes changes in the alignment of water molecules in the brain. The idea is that when a region is active it requires more oxygen, and thus seeing an increased amount of aligned molecules suggests that that particular region might be involved in a specific task. PET (positron emission tomography) is an invasive brain imaging technique which involves injecting an individual with radioactive glucose and measuring the amount of glucose in different brain regions. Similar to a region needing oxygen, a highly active region also needs glucose for its metabolic processes. If during a specific task a particular brain region were active, one would expect to see more signal from that brain region while being monitored by a PET scan.
PET scan?
DefinitionA positron emission tomography (PET) scan is an imaging test that uses a radioactive substance (called a tracer) to look for disease in the body.Unlike magnetic resonance imaging (MRI) and computed tomography (CT) scans, which reveal the structure of and blood flow to and from organs, a PET scan shows how organs and tissues are working.See also:Bone scanNuclear ventriculographyPulmonary ventilation/perfusion scanRenal scanThyroid scanAlternative NamesNuclear medicine scan; Positron emission tomographyHow the test is performedThe health care provider will inject a small amount of a radioactive material into one of your veins, usually on the inside of the elbow. The substance travels through the blood and collects in organs and tissues.You'll be asked to wait nearby as the radioactive substance is absorbed by your body. This usually takes about 1 hour.Then, you will lie down on a table that slides into a tunnel-shaped hole in the center of the PET scanner.The PET machine detects energy given off by the radioactive substance and changes it into 3-dimensional pictures. The images are sent to a computer, where they are displayed on a monitor for the health care provider to read.You must lie still during the PET scan so that the machine can produce clear images. How long the test takes depends on what part of the body is being scanned.How to prepare for the testYou must sign a consent form before having this test. You will be told not to eat anything for 4 - 6 hours before the PET scan, although you will be able to drink water.Tell your health care provider if you are pregnant or think you might be pregnant.Also tell your health care provider about any prescription and over-the-counter medicines that you are taking, because they may interfere with the test.Be sure to mention if you have any allergies, or if you've had any recent imaging studies using injected dye (contrast).During the test, you may need to wear a hospital gown. Take off any jewelry, dentures, and other metal objects because they could affect the scan results.How the test will feelYou will feel a sharp prick when the needle with the radioactive substance is inserted into your vein. You shouldn't feel anything during the actual PET scan.Why the test is performedA PET scan can reveal the size, shape, position, and some function of organs.This test can be used to:Check brain functionDiagnose cancer, heart problems, and brain disordersSee how far cancer has spreadShow areas in which there is poor blood flow to the heartSeveral PET scans may be taken over time to determine how well you are responding to treatment for cancer or another illness.Normal ValuesThere are no problems detected in the size, shape, or position of an organ. There are no areas in which the radiotracer has abnormally collected.What abnormal results meanAbnormal heart functionAbnormal size, shape, or position of an organAlzheimer's diseaseCancer (presence and how far it has spread)Change in organ functionGrowthsInfectionWhat the risks areThe amount of radiation used in a PET scan is low. It is about the same amount of radiation as in most CT scans. Also, the radiation doesn't last for very long in your body.However, women who are pregnant or are breastfeeding should let their doctor know before having this test. Infants and babies developing in the womb are more sensitive to the effects of radiation because their organs are still growing.It is possible, although very unlikely, to have an allergic reaction to the radioactive subtance. Some people have pain, redness, or swelling at the injection site.Special considerationsIt is possible to have false results on a PET scan. Blood sugar or insulin levels may affect the test results in people with diabetes.Most PET scans are now performed along with a CT scan. This combination scan is called a PET/CT.ReferencesBeller GA, Kramer CM. Nuclear cardiology and computed tomography. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 54.Ettinger DS. Lung cancer and other pulmonary neoplasms. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 201.Hackney D. Radiologic imaging procedures. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 419.
What is abnormal focal activity of left knee?
Abnormal focal activity in the left knee typically refers to a specific area of increased metabolic or functional activity detected on imaging studies such as MRI or PET scan. This activity may indicate inflammation, infection, tumor, or other abnormality in the knee joint. Further evaluation by a healthcare provider is recommended to determine the cause and appropriate treatment.
Positron-emission tomography forms images of body tissues this is known as what?
Positron-emission tomography (PET) forms images of body tissues using radioactive tracers that emit positrons. This imaging technique is used to detect functional processes in the body, such as metabolism or blood flow, and is commonly used in medical diagnosis and research.
Who invented fleece?
sheep
Is there an app available that can scan pet microchips?
Yes, there are apps available that can scan pet microchips. These apps use the smartphone's camera to scan the microchip and provide information about the pet.
What type of procedure is a PET scan?
cat scan
What is a Diagnostic body scan that is referred to as a ped scan?
Are you talking about a PET scan?
What advantage does the MRI scan have over the Pet scan for the subject?
A PET scan shows what level / stage (if any) the cancer is at. An MRI scan doesn't do this, the reader, looks for abnormalities on the scan which shows up everything in the body.
Is pet scan different from pep scan?
Yes, a PET scan (Positron Emission Tomography) and a PEP scan (which usually refers to Positron Emission Tomography with a specific tracer, like 18F-FDG) are essentially the same imaging technique, but "PEP" is not a commonly used term. PET scans utilize radioactive tracers to visualize metabolic processes in the body, primarily for cancer diagnosis and monitoring. The distinction may arise from the specific tracers or protocols used, but fundamentally, they both refer to the same imaging modality.
Can you have a pet scan and bone scan on same day?
Yes, but bone scan has to be completed first.
How much does a pet scan for a dog cost?
A PET scan, or Positron Emission Tomography, is used to scan internal organs for abnormalities, like tumors, or cancer. PET scans for animals may cost hundreds, or thousands of dollars, depending on the size of the animal, and the complexity of the scan.
Can you have braces on during a pet scan?
no
Can I take aspirin before pet scan?
It's generally advised to avoid taking aspirin or other non-steroidal anti-inflammatory drugs (NSAIDs) before a PET scan, as they can affect the scan results by altering blood flow and metabolism. Always consult with your healthcare provider for specific instructions tailored to your situation. They can provide guidance based on your medical history and the reason for the scan.
How long does a pet scan take?
A full body PET scan can take 30 to 45 minutes. A scan of a single lamp or a single organ can take as little as 10 minutes.
Can you have a biopsy before a pet scan?
Yes, you can have a biopsy before a PET scan, and in some cases, it may be beneficial. A biopsy can provide crucial tissue samples for diagnosis, which may help inform the interpretation of the PET scan results. However, the timing and order of these procedures should be determined by your healthcare provider based on individual circumstances and the specific medical context. Always consult with your medical team for personalized advice.
What is salary for pet scan technologist?
$92,000
