Portal de Periódicos da CAPES

Neurosurgical Evaluation of Ultrasonic Encephalograph

1965; American Association of Neurological Surgeons; Volume: 22; Issue: 5 Linguagem: Inglês

10.3171/jns.1965.22.5.0437

1933-0693

Theodore Kurze, Peter Dyck, Howard S. Barrows,

Fetal and Pediatric Neurological Disorders

T im clinical applicat ion of ul trasonic techniques to intracranial diagnostic problems has been luring investigators since 1947. 2,3,~,9,I~ In 1950, Bal lant ine and associates 2,3 and Hue t e r and Bolt 12 were able to obta in reproducible ventr icular pa t terns by scanning of ultrasonic t ransmission of the living h u m a n head; clinical tr ial was abandoned because of the complexit ies of the technique and the l imitat ions of its accuracy. The same year French et al. 1~ reported their da ta which indicated t h a t normal brain and neoplastic tissue exhibited a differential impedence to ultrasonic t ransmission. Lcksell, '7 in 1955, utilized the echoranging principle to locate the cerebral midline in the intact h u m a n head. He recognized and demons t ra ted its pract ical value in the detection of surgical intracranial complications following head injury and demons t ra ted the pos topera t ive re turn of the central cerebral echo to the midline af ter surgical removal of a clot. Identif icat ion of the precise ana tomica l s t ructure responsible for the midline echo p romp ted numerous speculations, ingenious and diverse exper imental efforts 5,11,1~,1s with conflicting da ta and conflicting conclusions. Mos t invest igators now agree t h a t the M echo represents the diencephalic midline. Clinical experiences with ultrasonic encephalography in 2,~35 cases have been recorded f rom clinics in Western Europe and Grea t BHtain. 1,s,13,14,18,19,21,22 The abi l i ty of the ultrasonic encephalograph to locate the correct posit ion of the diencephalic midline in these cases averaged 94.9 per cent. Recent ly , reports on the clinical appl icat ion