During the period of one year, from the 21. 4. 1992 to 21. 4. 1993, a
total of 201 radiosurgical sessions on 181 patients were performed wit
h the first Austrian Gamma-unit in Graz. 42% of radiosurgical sessions
were undertaken for malignomas, 20% for meningiomas, 11.5% for vascul
ar malformations, 9% for neurinomas, 8.5% for low grade astrocytomas a
nd glomus jugulare tumours, 5% for sellar and suprasellar lesions, and
4% for functional disorders. Dose plan data for all the lesions treat
ed are shown. Clinical and imaging data of the first year which are av
ailable for 120 patients (66%) are presented and discussed.