Positron emission tomography (PET) makes use of small amounts of radioactive supplies known as radiotracers, a particular digital camera and a computer to help evaluate your organ and tissue capabilities. By figuring out body adjustments on the mobile level, PET could detect the early onset of illness earlier than it’s evident on different imaging exams.
A PET scan is considered to be a protected procedure. It exposes you to around the same quantity of radiation that you would receive from the general setting over about three years. The injected radioactive chemical substances have a really quick lifespan and are removed from the physique fairly shortly. A radiologist is a specialist physician who has coaching in decoding photographs of the within of the physique. A radiologist will look at the pictures that a PET scan produces, and report the outcomes to the physician who’s treating you.
A CT or MRI scan can assess the dimensions and shape of body organs and tissue. However, they can’t assess function. A PET scan seems to be at operate. In other phrases, MRI or CT scans inform you what an organ looks like, whereas a PET scan can tell you how it’s working. It will take about 60 to ninety minutes for the radiotracer to start out working, relying on what sort of data your doctor is in search of.
When you might be ready on your scan, you can be taken to the scanning room. A PET scanner is a large machine with a round, doughnut-formed hole within the middle, similar to a CT or MRI unit. Within this machine are multiple rings of detectors that file the emission of energy from the radio-tracer. If your PET-CT is for radiation remedy planning, you may put on a masks or forged in the course of the scan. These help keep your physique in the identical position as for treatment. It may provide a extra full image of a tumour’s location, progress or spread than both test alone.