Some hospitals now use a hybrid PET/MRI scan. ![]() This combination test produces 3D images that allow for a more accurate diagnosis. Your healthcare provider may perform a PET scan and CT scan at the same time (PET-CT). PET scan images can detect cellular changes in organs and tissues earlier than CT and MRI scans. PET scans use a radioactive tracer to show how an organ is functioning in real time. Both produce still images of organs and body structures. ![]() Magnetic resonance imaging (MRI) scans use magnets and radio waves. What’s the difference between a PET scan, CT scan and MRI?Ĭomputed tomography (CT) scans use X-rays. They can also assess certain heart and brain issues with the scan. Healthcare providers frequently use PET scans to help diagnose cancer and assess cancer treatment. The scanner detects diseased cells that absorb large amounts of the radiotracer, which indicates a potential health problem. ![]() The test uses a safe, injectable radioactive chemical called a radiotracer and a device called a PET scanner. ![]() What is a PET scan?Ī positron emission tomography (PET) scan is an imaging test that produces images of your organs and tissues at work. A positron emission tomography (PET) scan uses a safe injectable radioactive chemical called a radiotracer and a device called a PET scanner to show images of your organs and tissues at work.
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