Radiosurgical treatment of epilepsy.

Focal irradiation of epileptic foci has been performed in a group of 6 epileptic patients, of whom 2 presented with epilepsy and 4 with epileptic psychoses. The epileptic focus was localized by means of conventional scalp EEG, electrocorticography and stereoelectroencephalography. Radiosurgery was performed by coupling a stereoguide to a 60Co unit using a 10-mm diameter collimator. An estimated dose of 10 Gy was administered. Results are presented and the mechanism of action of radiation discussed.