Preparation for the Procedure
Do not eat or drink anything, except water, for 6 hours before the exam.
You may drink water, as much water as you can would be helpful, until arrival.
Routine medications may be taken, unless you have been instructed otherwise.
What should you not do before a PET scan?
Body Scan with FDG – PET/CT
- 48 hours before your appointment. Do not do any strenuous exercise or deep-tissue massage.
- 24 hours before your appointment. Stay on a VERY LOW-carbohydrate, NO-sugar diet. Please see Low-Carbohydrate Diet Guidelines below.
- 6 hours before your appointment. Do NOT eat anything; drink only water.
What should I eat before a PET CT scan?
12 hours before your appointment:
You will be asked to eat a low carbohydrate diet. Foods that can be eaten include: meat, hard cheese, tofu, eggs, butter and vegetables with no starch. Some foods that are NOT allowed include: cereal, pasta, milk, breads and other sugars.
How long does a PET CT scan take?
How long does a PET scan take? After the radiotracer is injected into a vein, it usually takes up to one hour to travel throughout the body and be absorbed into the organs or tissues that are being examined. The PET scan itself may take another 30 to 60 minutes. Heart and brain studies take less time for imaging.
How do I prepare for a PET scan for cancer?
Follow your PET scan prep for best results
Unless your doctor tells you otherwise, don’t eat or drink anything, except for water or prescribed medicines for six hours before a PET scan. Your last meal before the scan should include high protein foods and plenty of water. Avoid carbohydrates and foods with sugar.