Development of new means and methods of cerebral temperature monitoring is an actual problem due to the fact that severity and outcomes of diseases in patients with brain damages (strokes, a head trauma) in big degree depend on development of neurogenetic fever and a local cerebral hyperthermia. The temperature monitoring, which is carried out by the implanted sensors, is applied in neurosurgical patients and is practically not used in patients with disorders of cerebral bloodflow. In this regard, noninvasive techniques of brain temperature registration are developing: proton nuclear magnetic resonance spectroscopy and registration of own electromagnetic radiation (EMR) at the high range of frequencies (microwave). The main objective of the study was to define of diagnostic opportunities of noninvasive temperature measurement of brain by means of microwave radiothermometry.