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PET Myocardial Perfusion Imaging

Doctor wearing a stethoscope around his neck with a digital heartbeat line overlay representing cardiac care at Riverside Cardiology Associates.
What Is PET Myocardial Perfusion Imaging?

PET Myocardial Perfusion Imaging is a diagnostic test that uses Positron Emission Tomography (PET) to visualize blood flow to the heart muscle. It helps detect coronary artery disease (CAD) by providing detailed images of the heart’s blood supply. The test uses a radioactive isotope, Rubidium-82, which is injected into the bloodstream. The PET scanner captures the isotope to create high-resolution images of the heart, allowing cardiologists to assess blood flow, detect blockages, and evaluate the heart’s overall health.

How the Test Works
  • Chemical Stress Test: Similar to SPECT, the patient receives regadenoson to dilate the coronary arteries and simulate exercise.
  • Isotope Injection: The Rubidium-82 isotope is injected into the bloodstream. The PET scanner captures the isotope to produce high-resolution images of the heart’s blood flow.
Benefits
  • Faster and More Efficient: PET typically takes 30 minutes, while SPECT can take several hours.
  • Clear Images for More Patients: PET images are less affected by soft tissue, which can be helpful for patients with larger body sizes.
  • Short-Lived Tracer: Rubidium-82 loses its radioactivity within minutes, so it doesn’t linger in the body. Ask us if you have questions about radiation.
  • Precise Blood Flow Mapping: PET offers highly detailed images of heart blood flow, allowing cardiologists to detect even subtle signs of CAD.
What to Expect During the Test

During the procedure, you will lie still on a bed. The technician will administer regadenoson and the radioactive isotope. The test is completed in one session with no long waiting periods. The images obtained provide detailed information on the heart’s perfusion and blood supply, especially for patients at risk of CAD.