Dopamine is a neurotransmitter involved in the experience of rewards. Dopamine likely plays a role in gambling disorder (GD). The density of dopamine transporters (DAT) might be an important area of research. The researchers did a neuroimaging study on people with and without GD. They compared the DAT density between these two groups and did not find any differences. However, DAT density was associated with gambling-related factors in people with GD. Greater DAT density in the left striatum was related to greater gambling cravings and more time spent gambling. Greater DAT density in the right striatum was related to lower expectation to be able to stay away from gambling.