Why is the Meditation Research Institute Switzerland (MRIS) critical about brain scanners as a tool for meditators & teachers?

Richard R. Davidson used brain scanners for his research. And he is co-author of the book „Altered Traits“. But as far as we know, brain scanners are used by meditators & teachers only for research applications, and not for diagnostic and therapeutic applications, or as a tool to practice meditation. Brain scanners are used as …