regional cerebral blood flow ( rcbf ) alterations , as determined by single photon emission computed tomography ( spect ) using technetium tc 99m hexamethyl propylenamine oxime ( tc 99m-hm-pao ) , were studied in 15 infants and children presenting with cerebrovascular disorders between the ages of 2 weeks and 16 years .
C0021270
infants
C0008059
children