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Разработка алгоритма для обработки и анализа сигнала с оптического датчика измерения скорости кровотока

выпускная квалификационная работа бакалавра

Разработка алгоритма для обработки и анализа сигнала с оптического датчика измерения скорости кровотока

Abstract

Из-за растущей распространённости сердечно-сосудистых заболеваний большое внимание уделяется развитию методов кардиодиагностики для выявления патологий на ранних стадиях. Особое место среди диагностического оборудования занимают оптические датчики, которые позволяют неинвазивно проводить исследование пациента. Существуют различные методы анализа и обработки сигнала в оптических устройствах. Одним из таких методов является метод спекл-корреляции, он основывается на использовании автокорреляционной функции значений интенсивности рассеянного излучения, по которой находится значение скорости кровотока в микроциркуляторном русле. Цель данной работы заключается в разработке программного алгоритма обработки сигнала с оптического датчика скорости кровотока на основе метода спекл-корреляции. Для её достижения был проведен литературный обзор по методам и алгоритмам обработки сигнала при исследовании системы микроциркуляции крови, изучены теоретические основы спекл-корреляционного анализа и предложен программный алгоритм обработки сигнала, поступающего с фотоприемника. По результатам, полученным в проведенных экспериментах, можно заключить о применимости предложенного алгоритма обработки биологического сигнала в медицинской диагностике.

Due to the growing prevalence of cardiovascular diseases, much attention is being paid to the development of cardio diagnostic methods for detecting pathologies in the early stages. A special place among the diagnostic equipment is occupied by optical sensors, which allow non-invasive examination of the patient. There are various methods of signal analysis and processing in optical devices, one of them is the speckle correlation method. The method is based on the use of the autocorrelation function of the values of the scattered radiation intensity, which determines the value of the blood flow velocity in the microcirculatory bed. The purpose of this work is to develop a software algorithm for processing the signal from an optical blood flow velocity sensor based on the speckle correlation method. To achieve this goal, a literature review was conducted on the methods and algorithms of signal processing in the study of the blood microcirculation system, the theoretical foundations of speckle correlation analysis were studied, and a software algorithm for processing the signal coming from the photodetector was proposed. Based on the results obtained in the experiments, we can conclude that the proposed algorithm for processing the biological signal is applicable in medical diagnostics.

Keywords

signal processing algorithm, coherent radiation, оптический датчик, microcirculatory bed, спекл-корреляция, микроциркуляторное русло, рассеяние света, спекл, light scattering, speckle correlation, blood flow velocity, когерентное излучение, алгоритм обработки сигнала, speckle, optical sensor, скорость кровотока

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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