Hi: I need to compare the FDG-PET images of a individual patient to the mean of the normal subject group images... How can I do it ?... Could you please specify each processing step ?... Sincerely, Gonzalo Rojas Costa Department of Radiology Santa Maria Clinic Avda. Santa Marķa 0500, Providencia, Santiago, Chile. Tel: 56-2-4613074 Cel: 56-9-97771785 www.csm.cl