A brain imaging system can be operated to obtain brain image signals indicating activity at brain locations, and information can be extracted from the brain image signals. For example, for each of a set of living human brain regions that can have two or more possible activity features such as qualia features, feature values can be obtained indicating activity features of the region. The feature values can be more explicit than brain image data indicating activity at brain locations. A data structure can be produced that includes data indicating extracted information, such as qualia value data for a quale activity feature that can occur in a region. Such a data structure can be stored on a storage medium and used in diagnosis and/or treatment of detrimental conditions of consciousness.
