Automated system for early diagnosis of pathological changes in the bronchopulmonary system based on radio frequency scanning

 

I. V. Semernik ¹, A. V. Dem'yanenko ¹, F. S. Topalov ¹, Ya. V. Nevstruev ¹, O. E. Semernik ², A. A. Lebedenko ²

¹ Southern Federal University, Nekrasovskiy lane, 44, Taganrog 347922, Russia

² Rostov State Medical University, Nahichevansky av., 29, Rostov-on-Don 344022, Russia

 

The paper is received on March 14, 2019

 

Abstract. This paper presents the structure, design and practical implementation of an automated system for the detection of pathological changes in the bronchopulmonary system with the aim of non-invasive harmless diagnosis of bronchopulmonary diseases, primarily bronchial asthma.

The proposed diagnostic system is based on the use of radiofrequency scanning of the chest with microwave signals of various frequencies (in the frequency range from 1,100 to 1,500 MHz), which eliminates the need for the patient to perform breathing maneuvers during the examination process. The absence of harmful effects allows you to use the presented system for long-term monitoring of the patient's condition during treatment.

The obtained experimental results demonstrate the possibility of using the presented system to diagnose changes in the bronchopulmonary system. Heterogeneity, simulating the presence of sputum in the human lung is clearly displayed on the results of radio frequency scanning of the chest with a microwave signal with a frequency of 1250 MHz and 1350 MHz. At lower frequencies (1150 MHz and less), a distortion of the shape of the heterogeneity is observed. When scanning a phantom of the chest with a microwave signal with a higher frequency (1,450 MHz or more), only heterogeneity boundaries are detected on the scan results. Accurate determination of the shape and size of heterogeneity is difficult. In this regard, the use of higher frequencies of the probing microwave signal is impractical.

It should be noted that the shape and size of heterogeneity are most clearly defined by the results of radio frequency scanning with a step of 20 mm.  At step 30 mm, the shape of an irregularity is blurred, while at a scan with a step 10 mm, the influence of the non-uniformity of the characteristics of the elements of the array of antenna applicators increases and the scanning time significantly increases. The error in determining the size of heterogeneity depends on the selected scanning step and does not exceed 10 - 20 mm.

Key words: diagnostics, bronchial asthma, bronchopulmonary diseases, computerized diagnosis, microwave band, radiofrequency scanning, monitoring of the patient's condition, diagnostics equipment.

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For citation:

I.V.Semernik, A.V.Dem'yanenko, F.S.Topalov, Ya.V.Nevstruev, O.E.Semernik, A.A.Lebedenko. Automated system for early diagnosis of pathological changes in the bronchopulmonary system based on radio frequency scanning. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2019. No. 3. Available at http://jre.cplire.ru/jre/mar19/6/text.pdf
DOI  10.30898/1684-1719.2019.3.6