V.Yu. Leushin1, I.A. Sidorov2, I.O. Porokhov3, S.V. Chizhikov4, S.V. Agasieva5, R.V. Agandeev6

1,2,4,6 Bauman Moscow State Technical University (Moscow, Russia)

3 Center of NTI "Photonics" of RUDN University (Moscow, Russia)

5 RUDN University (Moscow, Russia)

Some studies have shown that pathological processes inside the human body are usually accompanied by a change in the natural thermal field. In order to correctly detect diseases, it is necessary to know the distribution of the thermal field in the human body and on its surface, as well as to know the reactions of the thermal field to physiological tests. As a rule, a person's outdoor temperature is measured with medical thermometers, thermal imagers, or pyrometers. It is impossible to measure the temperature inside the body by such methods, and the introduction of a thermal sensor under the skin leads to a violation of the natural thermal field. Therefore, the task of improving non-invasive methods of measuring internal temperatures in the human body for the purpose of early diagnosis and monitoring of pathological neoplasms is urgent.

There are full-scale experiments on the equivalent of the human body and directly on the human body in order to obtain data for 3D interpolation and visualization on a personal computer monitor screen of the structure of the internal thermal field inside the human body using a five-channel dual-frequency radiothermograph designed to operate in the wavelength ranges of 40 cm and 20 cm.

A five-channel two-frequency radiothermograph has been developed that allows 3D visualization of pathological changes in human internal tissues. Experiments were carried out on the equivalent of the human body and directly on the human body in order to obtain data for 3D interpolation and visualization on a screen of a personal computer of the structure of the internal thermal field inside the human body. It was made with the help of the developed five-channel dual-frequency radiothermograph.

There is possible to use the obtained results for further improvement of the methods of multi-channel multi-frequency radiothermographs in medical practice for more accurate localization of pathological neoplasms inside the human body.

Leushin V.Yu., Sidorov I.A., Porokhov I.O., Chizhikov S.V., Agasieva S.V., Agandeev R.V. Multichannel medical 3D radiothermograph. Biomedicine Radioengineering. 2022. V. 25. № 6. Р. 60-66. DOI: https://doi.org/10.18127/j15604136-202206-07 (In Russian)

1. Gulaev Y., Verba V., Gandurin V., Gudkov A., Leushin V., Tsiganov D. Passive and active radar methods of research and diagnostics of human living tissues. Biomedicinskie tehnologii i radio elektronika. 2006. № 11. P.14–20.
2. Vesnin S., Sedankin M. Miniature antenna-applicator for medical microwave radiometers. Biomedicinskaya radioelektronika. 2011. № 10. P. 51–56.
3. Gautherie M. Temperature and blood flow patterns in breast cancer during natural evolution and following radiotherapy. Progress in Clinical and Biological Research. 1982. № 107. P. 21–64.
4. Gulaev U., Leushin V., Gudkov A., Schukin S., Vesnin S., Kublanov V., Porohov I., Sedankin M., Sidorov I. Devices for pathological changes diagnosis in the human body by means of microwave radiometry. Nanotehnologii: razrabotka, primenenie – XXI vek. 2017. № 2. V. 9. P. 27–45.
5. Sedankin M., Leushin V., Gudkov A., Vesnin S., Sidorov I., Agasieva S., Markin A. Mathematical simulation of heat transfer processes in a breast with a malignant tumor. Biomedical engineering. 2018. V. 52. Iss. 3. P. 190–194.
6. Patent RF RU2328751. Multi-frequency radiothermograph / E. Birukov, V. Verba, A. Gudkov, V. Leushin, V. Plushchev, I. Sidorov. Priority 20.02.2008. IPC Class G01R29/08.
7. Sugiura T., Hirata H., Hand J.W., Van Leeuwen J.M.J., Mizushina S. Five band microwave radiometer system for noninvasive brain temperature measurement in newborn babies: Phantom experiment and confidence interval. Radio science. 2011. V. 46. RS0F08. P. 1–7.
8. Scheeler R., Kuester E.F., Popović Z. Sensing Depth of Microwave Radiation for Internal Body Temperature Measurement. IEEE Transactions on antennas and propagation. 2014. V. 62. № 3. P. 1293–1303.
9. Leushin V.Yu., Sidorov I.A., Novichikhin E.P., Chizhikov S.V., Gorlacheva E.N. Rezultaty eksperimental’nykh issledovanij mnogokanal’nogo medicinskogo 3D-radiotermographa. VII Vserossijskaya Mikrovolnovaya konferenciya. M.: IRE im. V.A. Kotel’nikova RAN. 2020. S. 396–402. (in Russian).
10. Sidorov I.A., Gudkov A.G., Leushin V.Y., Gorlacheva E.N., Novichikhin E.P., Agasieva S.V. Measurement and 3D Visualization of the Human Internal Heat Field by Means of Microwave Radiometry. Sensors. 2021. V. 21. P. 4005. https://doi.org/10.3390/s21124005
11. Novichikhin E.P., Sidorov I.A., Leushin V.Yu., Agasieva S.V., Chizhikov S.V. The improved algorithm for human body internal temperature calculating by multi-frequency radiothermography method. RENSIT. 2021.