QCJN-1 model EEG processing system have been used to measure EEGPS and BEAM iu twenty normal person and seven patients with intraeranial mass lesions (the left frontal temporal sabdural hematoma; the right thalamie hemorrhage; the right frontal

left parietal and right frontal-poly intracranial mass lesions; two rases of meningoma one diagnosed by CAG and other by clinic). The power spectrum percentage parameter of band is prevaling in each normal aged groups

.but which of δ and θ bands shows no significant difference (P>0.05 On contrast with group of patients who have intracranial mass lesion

the percentage param--i. ; of 6 and 9 bands increases more conspicuously than that of compared group (P<0.01) The location of intracranial mass lesions diagnosed by BEAM is consistent with the result of CT scan in five of seven patients and one with CAG