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National PET Scan Dade LLC › Patient Guidelines › Preparations Before Exam

Preparations Before Your Exam

Following these instructions carefully helps ensure your exam produces the most accurate results. If you have any questions, please call us at (305) 455-3000 before your appointment.

Before Your Appointment

Instructions by Exam Type

Preparation requirements differ between PET-CT and CT scans. Please read the instructions for your specific exam carefully.

PET-CT Scan

Positron Emission Tomography + CT Fusion
  • Fast for at least 6 hours before your exam. Do not eat or drink anything except plain water.
  • The day before: Follow a low-carbohydrate, high-protein diet. Avoid bread, pasta, rice, fruit, and sugary foods or drinks.
  • No caffeine on the day of the exam (no coffee, tea, energy drinks).
  • No exercise for 24 hours before your appointment. Avoid any strenuous physical activity.
  • Continue your medications as prescribed unless your doctor instructs otherwise. Take them with plain water only.
  • Drink plenty of water before and after your exam to stay hydrated.
  • Wear comfortable, loose-fitting clothing. Avoid garments with metal zippers, snaps, or underwire.

Diabetic patients: Special preparation instructions apply. Please call us at (305) 455-3000 before your appointment so we can provide specific guidance for your situation.

CT Scan

Computed Tomography
  • CT with IV Contrast: Do not eat solid foods for 4 hours prior. Clear liquids are allowed. Bloodwork (BUN/Creatinine) may be required — ask your doctor.
  • CT with Oral Contrast: Nothing to eat or drink for 4 hours before the exam.
  • CT without Contrast: No dietary preparation needed. Take your regular medications as normal.
  • Metformin (Glucophage) users: Contact us before your appointment. You may need to temporarily stop taking Metformin on the day of the exam and for 48 hours after.
  • Wear comfortable clothing without metal. You may be asked to change into a gown.
  • Known contrast allergies? Inform us when booking. Pre-medication may be required.

Not sure which type of CT you're having? Check your physician's order or call us at (305) 455-3000 and we'll clarify the preparation needed.

General Tips for All Exams

Arrive 15 minutes early to complete any paperwork.
Bring your photo ID and insurance card.
Bring your physician's referral/order for the exam.
Bring any previous imaging (CDs or films) related to your condition.
Leave jewelry at home or be prepared to remove it.
Have questions? Call (305) 455-3000 — we're happy to help.

Have questions about your preparation?

Our team is happy to walk you through everything before your appointment. Don't hesitate to call us.

(305) 455-3000 What To Bring