PURPOSE: EEG is widely used during positron emission tomography (PET) to confirm the interictal state of the @entity1 and assist in scan interpretation when a @entity410 occurs. Ictal scans usually reflect mixed @entity209 as @entity410 are brief in comparison to the 30-min uptake period of the tracer. We wished to determine whether routine EEG is justified and if @entity410 commonly affect the diagnostic information of the PET scan. METHODS: We examined the PET scans of 6 of 236 outpatients with @entity302 with clinical and electrical evidence of a @entity410 during tracer uptake. We performed semi-quantitative analysis in 2 @entity1 who had "ictal" and control interictal scans. RESULTS: @entity1 with single @entity410 lasting 23 s to 4 min [four @entity410 ( @entity410 ) and one @entity2048 ( @entity2048 )] had focal hypometabolism concordant with results of other investigations. One @entity1 with complex partial status had irregular cortical uptake and focal hypometabolism, but the site of the ictal focus could not be confirmed. CONCLUSIONS: In this group of @entity1 , @entity410 occurred infrequently during tracer uptake. The interpretation of the PET scan when single @entity410 occurred did not appear to be influenced by the continuous scalp EEG (CSEEG) recordings. The value of routine CSEEG in outpatients treated with medication should be reappraised, with potential cost savings. In rare circumstances in which a true ictal study occurs (complex partial status, @entity10895 partialis @entity10895 , and repetitive @entity410 ), PET scanning may be inconclusive and repeat interictal scanning should be pursued.

Clinical value of "ictal" FDG-positron emission tomography and the routine use of simultaneous scalp EEG studies in XXXX with intractable @entity302 .

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'patient'] @entity410 :: ('MESH:D012640', 'Disease') :: ['seizure', 'seizures', 'complex partial seizures', 'CPS'] @entity10895 :: ('MESH:D017036', 'Disease') :: ['epilepsia', 'continua'] @entity302 :: ('MESH:D004827', 'Disease') :: ['intractable epilepsy'] @entity2048 :: ('MESH:D004832', 'Disease') :: ['absence seizure', 'AS'] @entity209 :: ('MESH:D008659', 'Disease') :: ['interictal-ictal-postictal metabolic activity']
@entity1 :: (9606,Species) :: ['patients']
