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3. Before the Test

Before starting the test, a technician inserts an IV line into the participant and injects a radiotracer. It takes 20 to 40 minutes for a person’s body to absorb the radiotracer. Experts then use medical imaging to record the body at rest. At this point, a nurse or technician will attach electrodes and a blood pressure cuff.

doctor attaching electrodes Tempura / Getty Images

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Disclaimer

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.