Diagnostic Visualization of Changes in Biological Tissues by Ultrasound method Based on Doppler Effect

Authors І.M. Lukavenko , I.A. Symonenko

Sumy State University, 2, Rymsky-Korsakov St., 40007 Sumy, Ukraine

Е-mail i.lukavenko@med.sumdu.edu.ua
Issue Volume 13, Year 2021, Number 4
Dates Received 15 June 2021; revised manuscript received 09 August 2021; published online 20 August 2021
Citation І.M. Lukavenko, I.A. Symonenko, J. Nano- Electron. Phys. 13 No 4, 04025 (2021)
DOI https://doi.org/10.21272/jnep.13(4).04025
PACS Number(s) 85.30.De, 85.30.Tv, 73.40.Qv
Keywords Ultrasonic waves, Doppler effect, Sonograms, Blood flow rate.

Physical processes of ultrasonic waves influence on biological tissues are studied. It is shown that the reflection and absorption of ultrasound by tissues depend on their structure, properties and frequency of ultrasonic waves. The absorption coefficient of ultrasound changes significantly when the structure and condition of the tissue change due to the development of a pathological process in it. Ultrasound with therapeutic effect on the tissue causes mechanical, thermal and physicochemical effects, the relationship between which depends on the intensity of action and external conditions. It is found that strong absorption of ultrasound is observed at the tissue boundaries that have different acoustic properties. The mechanisms of ultrasonic waves influence on soft biological tissues are considered. Based on sonograms obtained in ultrasound devices using the Doppler effect, the assessment of blood flow velocity in benign tumors is performed. It is obtained that the blood flow velocity in benign breast tumors has a value from 0.6 to 0.3 cm/s (minimum value) and from 3.0 to 10.6 cm/s (maximum value). It is proved that the method of color Doppler mapping in the diagnosis of tumors gives a completely reliable result in the case of cysts and an unreliable result in sclerosing adenosis.

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