Functional imaging of the human body.

Design principles for apparatus and methods of safe, noninvasive functional imaging of a human organism by mapping physical electromagnetic fields are presented. The methods covered are infrared dynamic thermoimaging, radiothermal imaging, acoustothermometry, magnetic mapping of the heart and brain, electric imaging, and optical multispectral mapping.

[Methodologic problems in the use of dynamic magnetic mapping of the heart]. / Metodicheskie voprosy ispol'zovaniia dinamicheskogo magnitnogo kartografirovaniia serdtsa.

Dynamic magnetic maps have been constructed with the help of a magnetocardiograph, based on a superconductive quantum interferometric transducer, for 19 normal subjects, 12 patients with postinfarction cardiosclerosis, 5 patients with ventricular extrasystoles, and 1 patient with left-ventricular hypertrophy. A correlation between general patterns and ventricular depolarization phases of normal subjects' maps was demonstrated, using a biophysical myocardial excitation wave model as an even layer of current dipoles. Methods are proposed for the localization of ectopic pacemaker, postinfarction scars and hypertrophic myocardial areas within the same model.

[Electrical properties of the horny layer of human epidermis and its water transport]. / Elektricheskie svoistva rogovogo sloia épidermisa cheloveka i transport vody v nem.

Experimental evidence was obtained concerning the connection between the electric parameters of epidermis horny layer of the man's skin and water transport in the course of imperceptible perspiration. Two-layer diffusion model of water transport was considered.

[Dynamic thermomapping of the brain of the rat during sensory stimulation and spreading depression]. / Dinamicheskoe termokartirovanie golovnogo mozga krysy pri sensornoi stimuliatsii i rasprostraniaiushcheisia depressii.

Dynamics of spatial distribution of temperature over the dorsal surface of white rat cerebral cortex was studied through the skull with the thermovision technics. Visual, somatosensory and acoustic stimulation revealed both diffuse and regionally specific thermoreactions of the brain as well as multiple local termoresponses. After injection of KCl into the cortex temperature waves spreading over the cortex were obtained. Mechanisms of brain patterned thermoreactions dealing with blood flow and neuronal metabolic thermoproduction are discussed.

[Dynamics of relaxation of the triboelectric charge on the surface of the horny layer of the epidermis]. / O dinamike relaksatsii tribozariada na poverkhnosti rogovogo sloia épidermisa kozhi.

Some results are presented of relaxation process of the triboelectric charge placed on the outer surface of human epidermis ("stratum cornium"). In measurements the characteristic time of the relaxation process was equal to tau approximately 10 divided by 10(3) sec. The measured values of tau and capacity of the high-resistivity stratum of epidermis (C approximately 10(+4) pF/sm2) lead to resistivity of "stratum cornium" R approximately 10(9) divided by 10(11) omega X sm2.