I begge undersøgelser blev billederne fra raske forsøgspersoner (45 i alt) sammenholdt med billeder fra patienter med Parkinsons sygdom (180 patienter) eller essentiel tremor (29 patienter).
In both studies, images obtained in healthy volunteers (45 in total) were compared to those in patients with Parkinson’ s disease (180 patients) or essential tremor (29 patients).