V.N. Makarov1, N.A. Boos2, M.A. Makhov3, K.O. Kuchin4

1,2 MIREA – Russian Technological University (Moscow, Russia)

1,3,4 Firm “Technosvet” LLC (Moscow, Russia)

Existing radiofrequency volumetric heating systems do not allow the surgeon to control the process of tumor destruction due to the lack of information about the temperature at the periphery of the tumor. The introduction of additional temperature sensors at the periphery when using multi-electrode heating devices will greatly complicate the design of the installation. At a known temperature on the surface of the working electrode, one can try to reconstruct the temperature profile along the radius by resorting to numerical calculations.

The aim of this work was to improve the characteristics of radio frequency devices by introducing a preliminary calculation of the heating power and time based on known tumor sizes, followed by calculation of the temperature field profile along the tumor radius and virtual visualization of this field, as well as displaying information about the current, voltage, impedance and temperature of the electrodes on the monitor.

For the research, an experimental setup assembled on the basis of the METATOM-3 complex was used; multielectrode bipolar heating systems were used as heating systems. temperature field on the image of the tumor obtained from the ultrasound scanner.

The practical significance of the work lies in the creation of a complex that provides the inclusion of certain electrodes according to the selected coordinate on the template grid, setting the length of the working part of a particular electrode, measuring the temperature on the electrode surface and creating a virtual temperature profile in the tissue undergoing ablation. Industrial ablative systems of this kind are unknown.

Makarov V.N., Boos N.A., Makhov M.A., Kuchin K.O. Development of a mock-up of an automated hardware and software complex for tumor ablation. Biomedicine Radioengineering. 2022. V. 25. № 2–3. Р. 94-103. DOI: https://doi.org/10.18127/j15604136-202202-10
(In Russian)

1. Makarov V.N., Boos N.A. Tendentsii razvitiya ustanovok dlya radiochastotnoy ablyatsii. Biomeditsinskaya radioelektronika. 2021. T. 24. № 6. S. 58–68. (in Russian).
2. Dolgushin B.I., Kosyrev V.Yu. Radiochastotnaya termoablyatsiya opukholey. Pod red. M.I. Davydova. M.: Prakticheskaya meditsina. 2015. 192 s. (in Russian).
3. Golberg S.N., Gazelle G.S., Solbiati L. et al. Large volume radiofrequency tissue ablation: increased coagulation with cooled-tip electrodes. Radiology. 1996. V. 201. P. 387.
4. Makarov V.N., Shmeleva D.V., Boos N.A. Fantom dlya kontrolya protsessa termoablyatsii. Russian Technological Journal. 2021. V. 9(1).
   P. 73–78. (in Russian).