Prior to Test

Bring a list of the medicines you take to the test. If you have diabetes, ask your doctor if you should take your medicine before the test. An abnormal blood glucose level may cause problems with the test results.

Let your doctor know if you have kidney problems. The doctor may need to take steps to keep your kidneys safe during the test.

If you are breastfeeding, talk to your doctor before you go for your test. Your doctor may tell you to pump breast milk to use until the contrast materials leave your body.

Several hours before the test you may need to:

• Stop eating after a certain time
• Avoid drinks with high sugar and calorie content
• Drink plenty of water

At the test center, the staff will ask if you have or ever have had:

• A reaction to contrast materials or iodine
• Allergies to contrast materials, iodine, or seafood
• Asthma
• Fear of small spaces or anxiety

Description of Test

If you are worried about being in small spaces, you may be given a medicine to help you relax. An IV will be placed in your arm. A small amount of the tracer substance (used for the PET part of the scan) will be injected through the IV. In some cases, the tracer substance will be breathed in or swallowed instead. You will wait about 60 minutes after this injection. You will be positioned on a table. More contrast material (used for the CT part of the scan) will be given. The table will move slowly through a doughnut-shaped ring. You will need to lie still for about 35 minutes while the pictures are taken.

After Test

You should drink extra water throughout the day after your scan. This helps to flush the tracer materials from your body. If you had medicine to help you relax, you will need to have someone drive you home. You can expect to return to your normal activities the same day as your test.

How Long Will It Take?

The scan takes about 2 hours. The injection is given about an hour before the scan. The scan itself takes about 35 minutes.

Will It Hurt?

You may have discomfort when the IV is put in. There should be no other pain. You may feel some flushing when the tracer material is injected.

Results

Based on the results, your doctor will decide if more tests or treatments are needed.