2. APPLICATIONS Evaluating the collateral circulation during internal
carotid balloon test occlusion,
Evaluating the distribution of amobarbital sodium
during the Wada test,
Evaluating vasospasm associated with
subarachnoid hemorrhage or cerebral angiogra-
phy,
Evaluating cerebrovascular reserve before carotid
endarterectomy,
Presurgically localizing seizure foci,
Guiding stereotactic biopsy for evaluation of tumor
recurrence.