Head of Medical Biophysics Laboratory, University Clinic; Privolzhsky Research Medical University, 10/1 Minin and Pozharsky Square, Nizhny Novgorod, 603950, Russia; Professor, Department of Animal Physiology and Biochemistry; Nizhny Novgorod State Agricultural Academy, 97 Prospekt Gagarina, Nizhny Novgorod, 603107.
PhD Student, Assistant, Pathologic Anatomy Department; Privolzhsky Research Medical University, 10/1 Minin and Pozharsky Square, Nizhny Novgorod, 603950, Russia.
Sovrem Tekhnologii Med. 2021;12(5):57-60. doi: 10.17691/stm2020.12.5.06. Epub 2020 Oct 28.
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.
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.
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.
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.
评估近场共振微波探测的效率，以研究健康大鼠不同身体部位的覆盖组织的介电特性。
使用近场共振微波探测，对成年 Wistar 大鼠（n=30）的四个身体部位（背部的内侧和腰部、额头、腹部）的皮肤介电特性（介电常数和电导率）进行了研究。测量使用了俄罗斯科学院应用物理研究所联邦研究中心设计的特殊硬件和软件系统。
皮肤和下面组织的介电特性根据身体部位有显著的差异。内侧背部区域的介电常数和电导率最高，而腹部区域的最低。额头和尾部区域则表现出中间指数。在深入探测中，介电常数无论天线定位（3 和 5 毫米）如何都持续增加，而电导率则下降。
近场共振微波探测能够揭示每个身体部位的特定介电特性（包括介电常数和电导率指数以及它们分布的深度结构）。这些发现应该在覆盖组织的局部诊断中考虑，特别是在评估伤口下面的结构、伤口表面边界的定位以及伤口周围区域的状况时。
