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Hello folks. I have heard two older ladies today in the waiting room in the hospital talking about something that is called positron emission tomography scan. Apparently one of those ladies needs to do this scan and they were discussing is it dangerous and what they need to do for this scan, how does this scan work. I have never heard about this, i wrote it down in my phone to remember and to ask you here. I just remembered this :) So can you tell me what do you know about this? How does positron emission tomography PET scan work? 

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Hey MakeMeCoffee,

A positron emission tomography (PET) scan is an imaging test that allows your doctor to check for diseases in your body.

The scan uses a special dye that has radioactive tracers. These tracers are injected into a vein in your arm. Your organs and tissues then absorb the tracer. When highlighted under a PET scanner, the tracers help your doctor to see how well your organs and tissues are working. The PET scan can measure blood flow, oxygen use, glucose metabolism (how your body uses sugar), and much more.

The risks of the test are minimal compared with how beneficial the results can be in diagnosing serious medical conditions.

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Hello there,

PET scans are most commonly used to detect cancer, heart problems, brain disorders, problems with the central nervous system, and so on, it is a very good and useful scan.

Unlike other imaging tests, such as CT or MRI, PET scans show problems at the cellular level. This gives your doctor the best view of complex systemic diseases, such as coronary artery disease, brain tumors, memory disorders, and seizures.

When PET is used to detect cancer, it allows your doctor to see how the cancer metabolizes, and whether it has spread, or metastasized, to new areas. PET also shows how the tumor is responding to chemotherapy.
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Before the scan, you’ll get tracers through a vein in your arm, through a solution you drink, or in a gas you inhale. Your body needs time to absorb the tracers, so you’ll wait about an hour before the scan begins.

Next, you’ll undergo the scan. This involves lying on a narrow table attached to a PET machine, which looks like a giant letter “O.” The table glides slowly into the machine so that the scan can be conducted.

You’ll need to lie still during the scan. The technician will let you know when it is that you need to remain still. You may be asked to hold your breath for short periods. You’ll hear buzzing and clicking noises during the test.

When all the necessary images have been recorded, you will slide out of the machine. The test is then complete.

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Good day there. I am glad that you asked.
PET scans can be used to diagnose a health condition, as well as for finding out how an existing condition is developing. PET scans are also very often used to see how effective an ongoing treatment is. Now, once this is insude, the radiotracer will go to areas inside the body that use the natural chemical. For example, FDG) is tagged to glucose to make a radiotracer. The glucose goes into those parts of the body that use glucose for energy. Cancers, for example, use glucose differently from normal tissue - so, FDG can show up cancers.
Very simple, right?
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Hello there. It is actually very simple. PET scan is specialized radiology procedure that is used to examine various body tissues who can identify certain heart conditions. PET may also be used to follow the progress of the treatment for the certain health conditions. Now, while PET is very commonly used in the fields of the cardiology and neurology, applications in other fields are currently researched so I don’t know in which areas it is good as well. This is a type of NUCLEAR medicine procedure and this means that a very small amount of a radioactive substance is used to perform the procedure.

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