What are pet scans? What exactly is a pet scan?

Positron Emission. These studies are done by injecting a special "dye" that is attached to a specific molecule. Most of the pet today is done using FDG (a glucose/sugar look-a-like molecule). Wherever this molecule is used/concentrated, the pet scan is brighter. Hence, tumors/infections (which use a lot of energy/sugar/fdg) are bright on such studies. More: http://en.Wikipedia.Org/wiki/positron_emission_tomography.
PET. Positron emission tomography uses a radio tracer labelled glucose to assess glucose use by the body and attempt to find areas of increased use suggesting abnormal tissue. The CT scan shows the areas. Most often used to see if abnormal area on the ct scan is metabolically active. Hope this helps .
PET. PET scan usually refers to PET-CT scan where a CT scan is fused with a PET scan for interpretation. The CT is helpful for anatomic localization of uptake on PET. The PET portion of the exam shows metabolic activity (glucose uptake). Glucose is a nonspecific tracer and can be taken up in inflammatory, infectious, or malignant conditions.
Physiology of lesion. 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 it hard to see.
Positron . Positron emission tomography (pet) is a test that uses a special type of camera and a tracer (radioactive chemical) to look at organs in the body. The tracer usually is a substance (such as glucose) that can be used (metabolized) by cells in the body. During the test, the tracer liquid is put into a vein in your arm. The tracer moves through your body, where much of it collects in the specific organ or tissue. The tracer gives off tiny positively charged particles (positrons). The camera records the positrons and turns the recording into pictures on a computer. Pet scan pictures do not show as much detail as computed tomography (ct) scans or magnetic resonance imaging (MRI) because the pictures show only the location of the tracer. The pet picture may be matched with those from a ct scan to get more detailed information about where the tracer is located. A pet scan is often used to evaluate cancer, check blood flow, or see how organs are working.

Related Questions

I want to have an upcoming PET scan compared to the one 3 months earlier. Do I request a comparative report or a comparative study? What exactly?

I don't. know any facility that would perform a PET scan without a physician's order, so you probably don't need to worry about how to word the request. If you already have the order and want to make sure the facility has the proper information, when you call to schedule the test, tell them that you had a prior PET scan(when and where) and that this is a follow up study. Read more...

What is a pet scan?

Sophisticated. Positron emission tomography----a pet scan is a very sophisticated scan of the body using injected radio-isotopic materials that are taken up by different body tissues and when scanned "light up" to help determine, usually, if there is cancer. It has other purposes. Read more...
Metabolic scan. A pet scan measures the glucose (sugar) consumption of different tissues in your body. Some abnormal tissue will consume more glucose than the surrounding tissue, making it easy to see on the scan. Sometimes this can represent cancer, sometimes it is something else. Your doctor would order it to look for something specific. Read more...
NUCLEAR CT SCAN. Pet scan is one type of nuclear ct scan (other type is called spect scan) that uses gamma rays as opposed to x-rays used in conventional or standard ct scan. Read more...
Cancer detection. Pet (positron emission tomography) scans (usually coupled with ct (pet-ct) detect hypermetabolic regions which are suspicious for either primary or metastic cancer. Expert interpretation is needed to distinguish benign from suspicious findings. Pet may also be used to evaulate stroke, alzheimers and other brain conditions. Read more...
Cancer detection. A pet scan uses a marker that mimics glucose, which your body uses for energy. Since cancer grows more rapidly than normal tissue, it takes up more glucose, which is detected on a pet scan. This why pet is used to look for cancer. Some slow growing tumors may not be detected on pet however. Read more...

What can a pet scan show?

Functioning. It is a functional test and shows which parts of the body are using the most glucose. This is an indirect measure of how active the cells are. Read more...
What is the question. Currently pet scans are widely use for evaluation of glucose metabolism in the body. In oncology, is use to for initial metabolic characterization of tumors, metastases as well as for treatment response and surveillance. In cardiology, pet scans are use to assess heart ischemia and viability and in neurology the study is use to evaluate cognitive disorders, epilepsy and brain tumors . Read more...
Physiology of lesion. 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 it hard to see. Read more...
Many things. Pet scans can show many conditions but most often a glucose based tracer is used to evaluate for metabolic activity which can be increased in infectious/inflammatory conditions or malignancy. Read more...

Are suv on pet scan gamma?

suv. Suv on a pet scan is the unit of measurement that allows one to evaluate how much metabolism is in a particular area of the body. Read more...
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...

What is a pet scan used for?

Cancer usually. The most common illnesses studied are various types of cancer. Frontal temporal lobe dementia can be differentiated from alzheimers disease from lewy body dementia also. Read more...
Approved for cancer. Pet scan are approved for staging, response assessment and surveillance of certain types of cancers. However, any pathologic process that augments the consumption of glucose (such as infection or inflammation) can be evaluated, though these indications are not currently covered. In addition, pet scans are used to evaluate for brain cognitive disorder, heart ischemia and myocardial viability. Read more...
Usually cancer. A pet/ct scan is usually used to image glucose metabolism in people with cancer to identify the extent of the cancer. It can also be used to image the heart for cardiac evaluation. In addition, the pet bone scan can be used to image calcium metabolism which can be altered in many disease, most prominently bony metastatic cancer. Read more...
Pet.. The most common Pet scan use is for oncologic reasons however it can be used for many applications. FDG (labeled glucose) is the most common tracer and glucose metabolism can be measured which can be increased in inflammatory, infectious, or malignant conditions. Pet can also be used to evaluate the heart for ischemia or brain for dementia. Read more...

How is a pet scan conducted?

Track a tracer. Pet scans make use of tracers, radioactive compounds that bind to specific compounds of interest. The tracer is injected and, after a few minutes, the pet scanner looks to see where the radioactivity has ended up, and is thereby able to see how much of the compound of interest is present, and where it is located. Read more...
PET procedure. For oncologic purpose, patients should be fasting for 5-12 hours. A radioisotope tracer analogo to glucose is injected IV. Approximately 60 min later the patient is imaged on the whole body PET scanner to reveal malignant lesions. Patients are required to spend near 2 hours totally. The actual scan takes 35-45 minutes with the patient lying flat within the scanner. Read more...
Much like a CT. Pet/ct is a scanner which looks a lot like a ct scanner. However, 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 concerning. Read more...

Why do people get a pet scan?

Several reasons. Lung cancer, breast cancer, testicular and ovarian cancer, recurrent colorectal cancer, lymphoma, melanoma, recurrent brain tumors, tumor-therapy monitoring, and assessing effectiveness of treatments such as chemotherapy. Coronary artery disease and myocardial viability. Diagnosis of parkinson's, alzheimer's, huntington's, epilepsy, and stroke. Read more...
Cancer work-up. Usually patients get pet scans for cancer work-ups, diagnosis - but not always - can also be for inflammatory diseases. Read more...
PETs... Pet scans can be used for a variety of purposes depending on the specific radiotracer used. Most commonly, pets are done with FDG (glucose) for oncologic reasons. Other uses of pet include cardiac pet (viability and perfusion studies) or neurologic pet (for seizure focus mapping or dementia). Read more...

What is pet scan of the heartbfor?

Test heart function. A heart positron emission tomography (pet) scan is an imaging test using a radioactive substance to look for disease or poor blood flow in the heart. Unlike MRI or ct, which reveal the structure and blood flow to and from organs, a pet scan shows how organs and tissues are working. A heart pet scan can tell if areas of your heart muscle are receiving enough blood, if there is damage, or scarring. Read more...
Few different things. Pet is most helpful to evaluate heart perfusion, where the adequacy of blood flow to the myocardium in conjunction with exercise or pharmacologic stress is assessed. Evaluation of heart viability, which identifies chronically ischemic, but viable myocardium is also possible with pet. Finally, in patients with cardiac sarcoidosis pet is useful to assess the extent of disease and treatment response. Read more...
Blood Flow. A pet/ct with n13 ammonia allows evaluation of the flow of blood in the cardiac vessels, and is useful in determining if a patient would benefit from a more invasive test, called a cardiac angiogram, to better view suspected vessel narrowings (called stenoses) and possibly treat them with angioplasty and stenting. Read more...
Heart metabolism. Heart PET scan with injection of radioisotope can show whether areas of heart muscle receiving enough blood, heart damage or scar tissue in the heart, or build up of abnormal substances in the heart muscle.Unlike MRI and CT, which reveal structure of and blood flow to and from organs, PET scan gives more information about how organs and tissues are working. In other words metabolism of tissue. Read more...
Cardiac pet... Cardiac pet is useful to evaluate is there is ischemia (lack or blood flow and oxygenation) to the heart. It can also detect if there is myocardial scarring (heart attack) and if the wall motion and ejection fraction are normal. It is usually done with ammonia or rubidium pet tracer and pharmacologic stress agent. . Read more...