How you prepare

Tell your doctor:

• If you've ever had a bad allergic reaction
• If you've been sick recently or you have another medical condition, such as diabetes
• If you're taking any medications, vitamins or herbal supplements
• If you're pregnant or you think you might be pregnant
• If you're breastfeeding
• If you're afraid of enclosed spaces (claustrophobic)

Your doctor will give you detailed instructions on how to prepare for your scan. A general rule is to avoid strenuous exercise for a couple of days before the study and to stop eating four hours before the scan.