39 infants underwent conventional and power Doppler sonography (PDUS). In 25 normal cases, PD US clearly visualized the main trunks and medium sized branches of intracranial arteries. Prominent lentriculo-striate arteries and thalamostriate arteries were also visualized. In 14 cases with intracranial abnormalities, PDUS was useful to detect the tumor vessels, cerebral infarction and intra-cranial hemorrhage. PDUS is suggested to be a useful tool for visualizing intracranial arteries and diagnosing intracranial abnormalities of infants.
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