text: CT scan may show some structural abnormalities, but these findings are non-specific to diagnose autism spectrum disorder.
option_0: Autism CT
option_1: Hearing impairment MRI
option_2: Hearing impairment CT
option_3: Autism physical examination
option_4: Mental retardation MRI
option_5: Hearing impairment other diagnostic studies
option_6: Hearing impairment physical examination
option_7: Asperger syndrome physical examination