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PET/CT Scan Preparation

How to Prepare for Your PET/CT Scan

You may take your regular medications as prescribed, EXCEPT diabetic medications.

24 hours before your appointment:

  • Avoid all caffeine and sugar, including fruits.
  • Avoid strenuous physical activity or exercise.

The night before your appointment:

  • Eat a high-protein, low-sugar, low-carbohydrate supper consisting of any meat, eggs and vegetables.
  • DO NOT eat or drink dairy products, potatoes, pastas, cereals, breads, corn, peas, carrots, fruits and sugar.

Four hours before your appointment:

  • DO NOT eat or drink anything except water (if you are diabetic, stop food and drink six hours before your scan).

One hour before your appointment:

  • Drink two glasses of water.

What else you need to know:

  • Wear loose, comfortable clothing, without metal if possible.
  • Leave jewelry at home if possible.
  • Wear your hearing aid, glasses and/or dentures.

The exam will take about three hours from start to finish. Let the scheduler know if you are:

  • Sensitive or allergic to latex
  • Diabetic
  • Claustrophic
  • In need of pain medication for exam
  • Pregnant

Also tell your scheduler if you’ve had a prior PET/CT scan at another location.


Contact us at 319-294-1899.

Cancer, What Now?