joseph piven led the study. >> during infancy, it's a time when the infant is organizing their brain,e wiring is rapidly developing. we were able to detect changes in that wiring or differences in the wiring by six months of age and those children that went on to develop autism. >> reporter: this special type of m.r.i. scan shows the development of 15 different circuits in the brain. nsre developed nerve connections are in red. less developed in blue. the pattern is significantly different in infants with autism. >> it has great promise for early detection of autism, for early intervention of autism during a time that either prior to emergence of the symptoms or during a time when the symptoms are just beginning to unfold. >> reporter: early diagnosis is key because research suggests the symptoms of autism, problems with communication, social interaction, and behavior, can improve with early intervention. >> pelley: jon, what does this mean for parents? >> scott, i think it may be a sense of relief for them. i've spoken to a lot of parents of kids who have autism and they are up again