This text presents fields of neurosurgery and related areas in which progress has been made, and features detailed descriptions of standard procedures to assist young neurosurgeons in their postgraduate training. The articles are written by experienced clinicians.

This series, sponsored by the European Association of Neurosurgical Societies, has already become a classic. In general, one volume is published per year. The Advances section presents fields of neurosurgery and related areas in which important recent progress has been made. The Technical Standards section features detailed descriptions of standard procedures to assist young neurosurgeons in their postgraduate training. The contributions are written by experienced clinicians and are reviewed by all members of the Editorial Board.

Advances: ? Proton Spectroscopic Imaging in Cerebral Ischaemia, Where we Stand and what Can Be Expected (J. W. Berkelbach van der Sprenkel, N. M. J. Knufman, P. C. van Rijen, P. R. Luyten, J. A. den Hollander, C. A. F. Tulleken) ? Radiosurgery (L. Steiner, C. Lindquist, M. Steiner) ? Functional Imaging of Blood Brain Barrier Permeability by Single Photon Emission Computerised Tomography and Positron Emission Tomography (F. Iannotti)Technical Standards: ? Economic Aspects of Neurosurgery (B. Jennett and J. Pickard) ? Current Concepts of Measurement of Cerebrospinal Fluid Absorption and Biomechanics of Hydrocephalus (F. Gjerris, S.E. Borgesen) ? A Multidisciplinary Approach to the Treatment of Brain Vascular Malformations (F. Gentili, M. Schwartz, K. TerBrugge, M. C. Wallace, R. Willinsky, C. Young)