Richard R. Davidsons main tool for meditation research is a brain scanner: But we do not know who is the other group Richard R. Davidson mentioned who reproduced the data of this PNAS paper from 2004: https://pmc.ncbi.nlm.nih.gov/articles/PMC526201 But who else uses brain scanners? Brain scanners are medical imaging tools used to diagnose, monitor, and plan treatment for various neurological conditions …