PET Camera (IMAGE) Umea University Caption PET examination is a good method that for instance can be used to study the brain's dopamine system. The examination involves lying on a bed inside a circular camera. The result after processing the data is a three-dimensional image of for instance the brain. Credit Mikael Stiernstedt Usage Restrictions This photo may only be used in contexts related to this news release. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.