A cerebrograph imaging system was investigated for the diagnosis of cerebrovascular diseases.This system can quantitatively analyse and map the regional cerebral blood flow（rCBF）and also the electroencephalography（EEG）.The mapping of cerebellum-brain stem area was also realized. This system is the first one to combine the technology of nuclear medicine with electrophysiology

and thereby provide a combined information about the rCBF and the function of brain with coloured rCBF mapping

topogtaphical EEG mapping and quantitative data at the same time.It has important value for the early diagnosis of brain diseases

especially for the cerebral vascular accident.