Abstract
Positron emission tomography (PET) scanners generally consist of many PET detectors. The PET detector is important component because reconstructed imaging performance of the PET scanner depend on the PET detector performance. In this article, the basics of the PET detector are described such as important parameter, basic structure and components of the PET detector. Finally, depth-of-interaction (DOI) PET detector which is one of major topics in research field of the PET detector is introduced.
