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Commonly asked questions about your PET/CT exam:

Can I eat or drink before my scan?

Typically, you will be asked to not eat or drink anything except water for at least four hours before your scan.

How long will the scan last?

You can expect to be in the PET/CT center for one and a half to three hours. The actual scan takes far less time.

What does the procedure involve?

A small amount of radioactive glucose is injected into your blood stream through a small IV started by a technologist. You will then wait approximately one hour while the injected glucose is distributed through your body (Glucose is a common substance in the body and the minimal exposure of radiation is similar to that of a conventional CT scan). During this hour please try to remain still and calm. Too much movement can affect the quality of your exam. You will then be asked to lie on a table that passes slowly through the PET/CT scanner

What should I do to prepare?

  • TELL YOUR DOCTOR AND TECHNOLOGIST IF YOU ARE DIABETIC. 
  • Tell your doctor if you are pregnant, think you might be pregnant or if you are a nursing mother.
  • Wear comfortable clothing in layers.
  • You may wear your hearing aid, glasses and dentures to the PET/CT center but leave valuables at home. 
  • Take any prescribed medications on the day of your test unless instructed differently by your doctor.
  • Do not eat for at least four hours before your scan. 
  • Drink 24-30 ounces of water over two hours before the scan. Black decaffeinated coffee (no cream, no sugar) is acceptable along with the water. 
  • Avoid all beverages except water and black decaffeinated coffee for at least four hours before your scan.

How will I feel after the test?

There are no side effects from the injected radioactive glucose. You will be able to return to normal activities after your scan.

How will my physician get the results?

Once you have completed your exam a radiologist studies the images. The radiologist will then send a report to your physician.

If you have further questions please contact us at Radiology@lexhealth.org