Electrography methods, widely used in medical practice nowadays, make it possible to carry out the diagnostics of the functional state of a human organism, by establishing the connection between its electro-physiological and clinical-anatomy characteristics. Electrical activity of various organs and tissues is studied with the help of electroencephalograms (EEG), electrocardiograms (ECG) and electric puncture.

One of the most promising electrography methods of a human state study is the Method of Gas Discharge Visualisation (GDV), based on Kirlian effect (high frequency photography). Gas Discharge Visualisation (GDV) is computer registration and analysis of the glow, induced by the objects, including biological ones, when stimulated by electro-magnetic field with amplification in gas discharge.

On the basis of GDV-method a group of scientists guided by Professor K.G. Korotkov (St.-Petersburg IPMO - Institute of Precise Mechanics and Optics) has created a device "GDV Camera". It has been clinically tested, included into the state register of medical equipment and certified by the Ministry of Health of Russia.