Near-Field Resonance Microwave Sounding to Study Dielectric Properties of Different Skin Areas (Experimental Study)

Abstract

The aim of the study was to assess the near-field resonance microwave sounding efficiency to study the dielectric properties of investing tissues in different body areas in healthy rats. Materials and Methods. Skin dielectric properties (permittivity and conductivity) were studied in four body parts (medial and lumbar regions of the back, forehead, abdomen) of adult Wistar rats (n=30) using near-field resonance microwave sounding. For measurements, we used a special hardware and software system designed in the Federal Research Center Institute of Applied Physics of the Russian Academy of Sciences. Results. Dielectric properties of skin and underlying tissues significantly vary depending on a body area. The medial dorsal region was recorded to have the highest permittivity and conductivity level, while the minimum was found in the abdominal region. Frontal and caudal areas showed intermediate indices. In deepened sounding, dielectric permittivity consistently grows regardless of antenna localization (3 and 5 mm), while the conductivity recedes. Conclusion. Near-field resonance microwave sounding enabled to reveal dielectric properties specific for each body area (both by permittivity and conductivity indices and by deep structure of their distribution). The findings should be taken into consideration in topical diagnosis of investing tissues, particularly, when assessing the wound underlying structures, the localization of wound surface boundaries, and the condition of the areas around the wound.

Microwave study of the effect of cold argon plasma on functional state of rat’s skin

“…The dielectric parameters of the skin of animals in the treated area (in control group rats -at a similar point in the back) were evaluated upon completion of the full course of exposure. For this purpose, a specialized software and hardware complex was used, providing near-field resonant microwave probing of biological tissues [21,23]. The spectrum of the main evaluation indicators includes the dielectric permittivity of the medium and its , 01024 (2024) BIO Web of Conferences AQUACULTURE 2023 https://doi.org/10.1051/bioconf/20248401024 84 conductivity, calculated by the degree of shift of the resonant sounding frequency [20,21,23].…”

“…For this purpose, a specialized software and hardware complex was used, providing near-field resonant microwave probing of biological tissues [21,23]. The spectrum of the main evaluation indicators includes the dielectric permittivity of the medium and its , 01024 (2024) BIO Web of Conferences AQUACULTURE 2023 https://doi.org/10.1051/bioconf/20248401024 84 conductivity, calculated by the degree of shift of the resonant sounding frequency [20,21,23]. Probing was carried out by a single integrated sensor to a depth of 5 mm.…”

“…This diagnostic technology continues to develop, but the effectiveness of its use for assessing the condition of the skin (dermatoses, tumors of the integumentary tissues, burns, etc.) has already been demonstrated [17][18][19][20][21][22]. Consequently, near-field microwave sensing can act as a diagnostic search tool and to reveal the local effects of cold plasma in in vitro and in vivo experiments, as well as their features depending on the exposure parameters [18,[21][22][23][24].…”

“…has already been demonstrated [17][18][19][20][21][22]. Consequently, near-field microwave sensing can act as a diagnostic search tool and to reveal the local effects of cold plasma in in vitro and in vivo experiments, as well as their features depending on the exposure parameters [18,[21][22][23][24].…”