FIG 3. The ratio of rOEF values to those in adults distributed by age. Regardless of age, rOEF values were within or nearly in the range of adult values. Compared with rOEF values in adults, statistically significant differences were observed only in the thalamus and brain stem in the 1- to <3-year-old age group, in the parietal lobe in the 3- to <8-year-old group, and in the thalamus in the 
8-year-old group. rOEF values of the primary cerebral areas did not differ from those of the association areas in any age group, except in the frontal association and sensorimotor areas in the <1-year-old group. Asterisk indicates Mann-Whitney U-test, P < .05; a, paired t-test, P < .05
