dept header

Preparing for an Examination

Print this information

General Guidelines for ALL Patients:

  • Do not do any strenuous exercise or strenuous work the day before or the day of your test.
  • Please inform the technologist if you have any of the following conditions: Asthma, Diabetes, Multiple Myeloma, Pheocromocytoma, or if you are on dialysis.
  • Please inform the technologist if you have any Iodine or shellfish allergies, or if you have had an allergic reaction to a CAT scan in the past, or if you are taking corticosteroids or glucophage.
  • Wear comfortable clothing; you will need to change for this test.
  • Plan on being with us for 2 hours.
  • Please notify the technologist if you are pregnant or breast feeding.
  • Most people do not have a problem with claustrophobia. However, if you are claustrophobic you may schedule a time to come and see the equipment and how it moves. You may ask your physician to prescribe a single dose of a relaxant to take the day of your PET/CT exam. In such cases, arrangements should be made to have someone provide the patient with transportation after the exam.

Dietary Restrictions for ALL Patients:

  • Do not eat or drink (except water) 6 hours before your test. If your test is scheduled in the afternoon you may have a low-carbohydrate breakfast.
  • Have a low-carbohydrate dinner the night before your test.
  • You should drink at least two 16-ounce glasses of water the day before your test and one before coming in for your test.
  • NO caffeine, alcohol, or nicotine the day before or the day of your test
  • Take your usual medications the day of your test.

Dietary Restrictions for DIABETIC Patients:
(YOUR TEST WILL BE SCHEDULED IN THE AFTERNOON TO ALLOW YOU TO HAVE A LOW-CARBOHYDRATE BREAKFAST)

  • Have a low-carbohydrate dinner the night before your test.
  • Have a low-carbohydrate breakfast the day of your test, then nothing to eat or drink (except water) 6 hours before your test.
  • Take your oral medication or insulin early in the morning the day of your test.

Examples of Low-Carbohydrate Foods You May Eat:

  • All meats, fish, eggs, cheese and tofu
  • Non-starchy vegetables like: green beans, broccoli, spinach, zucchini and lettuce
  • Diet sodas
  • Margarine, butter and oils
  • Any foods containing 5 grams or less of carbohydrate per serving.

Examples of High Carbohydrate Foods NOT to Eat:

  • Peas, corn, rice, potato and beans
  • Milk and nondairy milk drinks
  • Fruit, fruit juices and sodas
  • All cereals, grains, pastas and breads
  • Any food containing more than 5 grams of carbohydrate per serving.