Avoiding coffee could help doctors get a better view of what's happening inside your body.
A new study suggests caffeine could interfere with results of a Pet or CT scan. For the scans to work, a radioactive tracer is absorbed by the heart. Researchers found when patients drank coffee, the heart took in too much of the tracer, making some lesions difficult to see.
Researchers say by avoiding all caffeine 24 hours before scans, doctors have a better chance of getting a "good view" of the body's condition.