Efficacy of intraoperative US for evaluating intracranial masses.

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Abstract
The efficacy of intraoperative neurosurgical ultrasound (US) scanning was determined in studies of 191 lesions (186 patients). US was deemed to have played a useful role in operations on 101 (53%) of these lesions, including 66 (49%) of the 136 brain tumors. The main utility of US imaging was in locating subcortical masses, but it also proved useful in identifying residual tumor after resection; locating cysts within tumors; delineating surrounding vascular structures; and locating subcortical cysts, hematomas, arteriovenous malformations, and inflammatory masses or abscesses. In light of these findings, US study appears to have a place in many intracranial operations.