A.Yu. Elizarov Dr. Sc. (Phis.-Math.), Senior Research Ioffe Institute Russian Academy of Science, St. Peter-burg A.G. Kuz-min Ph. D. (Phis.-Math.), Senior Research Scientist, Institute for Analytical Instrumentation Rus-sian Academy of Science, St. Peterburg A.V. Polegaev Dr. Sc. (Med.), Professor, Department of Neurosurgery, Military Medical Academy, St. Pe-terburg Yu. A. Titov Post-graduate student, Institute for Analytical Instrumentation Russian Academy of Science, St. Peterburg V. Yu. Cherebillo Dr. Sc. (Med.), Professor, Department of Neurosurgery, Military Medical Academy, St. Peterburg