PET Scan: Preparation and Procedure

How to Prepare for a PET Scan

Your physician may recommend that you undergo a PET scan if you are at high risk of cardiovascular disease, have signs or symptoms of disease, or are undergoing treatment for a specific condition. If you’ve been told you need a PET scan, you likely have many questions. Here is your guide to what to eat before a PET scan, what to expect before and after the procedure, and how to prepare for a PET scan in New Hampshire.

What Is a PET Scan?

A PET scan, or positron emission tomography scan, is a diagnostic medical imaging test. You will lie on an exam table, and you will have an IV inserted. The IV introduces a safe level of radioactive material into your veins so the blood flow can be seen using the imaging system. Your table will then be put inside a PET machine, which produces images of your blood vessels, organs, and tissues. The scanner can detect blood flow obstructions, heart damage, artery damage, and other cardiovascular conditions and symptoms.

Why Do I Need a PET Scan?

You need a PET scan so that your physician can obtain detailed images of your heart and the surrounding vascular system. This will help them monitor, prevent, and diagnose certain heart or cardiovascular conditions. The scans may be needed if other tests were inconclusive, or if they need more information in order to make a diagnosis or design a personalized treatment plan.

How Do I Prepare for a PET Scan Procedure?

A PET scan is an outpatient procedure, although one might be ordered if you have been admitted to the hospital with certain symptoms. Your physician will tell you what to expect and how to prepare, including:

• Providing a list of the medications, vitamins, and supplements you take
• Telling your provider if you have any allergies
• Fasting for at least six hours, unless you have diabetes
• Only drinking water and avoiding caffeine for at least 24 hours before the test
• Wearing comfortable clothing
• Not wearing metal jewelry, body piercings, or other accessories

Are There Any Restrictions on Foods to Eat Before a PET Scan?

Yes. Your physician will give you PET scan diet guidelines that are tailored to your age, health, symptoms, and the reason for the scan. Some common instructions include:

• Following a high-protein, low-carbohydrate, low-sugar diet for 24-48 hours before the scan
• Not eating or drinking anything except water for six hours before the scan
• Only taking medications recommended by your physician
• Avoiding chewing gum, mints, hard candy, or cough drops
• Avoiding foods high in sugar or carbohydrates, caffeine, and alcohol

If you have already been scheduled for a PET Scan, download the PET Scan Preparation Instructions here.

Call to Learn More About PET Scans

Cardiovascular Specialists of New England offers highly personalized patient care. We are pioneers in cardiac treatment, focusing on patient education, prevention, and holistic, non-invasive treatment methods. Our goals are to reduce stress, make sure you fully understand your procedure and treatment plan, and guide you in making healthier choices that improve your health and quality of life. Our team includes board-certified cardiologists and other highly trained specialists who use advanced procedures and interventions, and preventive care, to improve patient outcomes. Call us now to schedule a PET scan in New Hampshire, or contact us online if you have questions.