[Usefulness of 123I-IMP SPECT in patients with epilepsy]

N-isopropyl-p-[123I]iodoamphetamine(123I-IMP)SPECT and electroencephalography (EEG) were evaluated in 21 epileptic patients at interictal stage. The findings of 123I-IMP were compared with those of clinical symptoms and EEG. In 11 cases (85%) of 13 patients with the partial seizure, and 6 cases (75%) of 8 patients with the generalized seizure had focal decreased perfusion of 123I-IMP. The mean number of focal decreased perfusion areas were 3.2 locations 1 case. There were no cases that was observed focal increased perfusion. Focal decreased perfusion area of 123I-IMP SPECT findings agreed with the focuses those were inferred from clinical findings in 8 cases (62%) out of 13 patients with the partial seizure, did not agree in 3 cases (23%) and did not detected in 2 cases (15%). Overall abnormality of 123I-IMP SPECT was observed in 17 cases (81%) out of 21 patients, on the other hand abnormality of EEG was observed in 12 cases (57%). 123I-IMP SPECT may provide useful information for evaluating foci in patients with epilepsy.