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1

Data analysis system for surface potential of biological tissues

Hyka Oleksii, Vejar Andres, Rymarczyk Tomasz

Przegląd Elektrotechniczny

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2022

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R. 98, nr 5

157--160

EN

A portable low-power monitoring system for measuring surface biopotential and data processing is presented. The small device was designed using hardware and codesign. The system is based on a microcircuit consisting of a field-programmable gate array device and a dual-core microcontroller. The selected reconfigurable hardware provides the desired level of speed and accuracy combined with low power consumption for online data processing applications. Spectroscopy impedance measurements are used to analyze the electrical properties of biological tissue.

PL

Przedstawiono przenośny system monitorowania o niskim poborze mocy do pomiaru biopotencjału powierzchniowego i przetwarzania danych. Małe urządzenie zostało zaprojektowane z wykorzystaniem projektowania sprzętowego i kodowego. System oparty jest na mikroukładzie składającym się z programowalnej matrycy bramek oraz dwurdzeniowego mikrokontrolera. Wybrany rekonfigurowalny sprzęt zapewnia pożądany poziom szybkości i dokładności w połączeniu z niskim zużyciem energii dla aplikacji przetwarzania danych online. Pomiary impedancji w spektroskopii są wykorzystywane do analizy właściwości elektrycznych tkanki biologicznej.

2

Polarization tomography of the polycrystalinne structure of histological sections of human organs in determination of the olddamage

Litvinenko Olexandra, Paliy Victor, Vуsotska Olena, Vishtak Inna, Kumargazhanova Saule

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

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2022

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T. 12, nr 4

31--34

EN

The results of algorithmic approbation of the technique of polarization tomography digital histological study of the age of damageto the myocardium and lung tissue based on the polarization reconstruction of linear birefringence maps are presented. Relationships betweenthe temporal change in the magnitude of statistical moments of 1-4 orders characterizingthe distribution of the magnitude of the degree of crystallization of histological sections of the myocardium and lung tissue and the duration of damage were determined. Established time intervals and accuracyof determining the prescription of damage to the myocardium and lung tissue.

PL

Przedstawiono wyniki algorytmicznej aprobaty techniki polaryzacyjnej tomografii cyfrowej histologicznego badania wieku uszkodzenia mięśnia sercowego i tkanki płucnej na podstawie rekonstrukcji polaryzacyjnej liniowych map dwójłomności. Określono zależnościpomiędzy czasową zmianą wartości momentów statystycznych 1-4 rzędów, charakteryzujących rozkład stopnia krystalizacji skrawków histologicznych tkanki mięśnia sercowego i płuc, a czasem trwania uszkodzeń. Ustalono przedziały czasowe i dokładność określaniapredykcji uszkodzenia mięśnia sercowego i tkanki płucnej.

3

Processing multispectral images of the surface of biotissues using fuzzy logic

Petrov Oleksandr

Przegląd Elektrotechniczny

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2020

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R. 96, nr 12

71--75

EN

The method uses multispectral image segmentation based on measuring diffuse reflection coefficients at certain wavelengths of spectral channels, solving the inverse optical problem of determining the concentrations of hemoglobin destruction products in the near-surface biotissues, filtering and segmentation of the image, calculating the relative sizes of segments and determination of damages using fuzzy logic.

PL

Metoda wykorzystuje wielospektralną segmentację obrazu opartą na pomiarze współczynników odbicia rozproszonego przy określonych długościach fali kanałów widmowych, rozwiązując odwrotny problem optyczny określania stężeń produktów niszczenia hemoglobiny w biotekstach powierzchniowych, filtrowania i segmentacji obrazu, obliczania względnych rozmiarów segmentów i określanie uszkodzeń za pomocą logiki rozmytej.

4

Instance Segmentation Model Created from Three Semantic Segmentations of Mask, Boundary and Centroid Pixels Verified on GlaS Dataset

Malík Peter, Krištofík Štefan, Knapová Kristína

Annals of Computer Science and Information Systems

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2020

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Vol. 21

569--576

EN

Segmentation is the key computer vision task in modern medicine applications. Instance segmentation became the prevalent way to improve segmentation performance in recent years. This work proposes a novel way to design an instance segmentation model that combines 3 semantic segmentation models dedicated for foreground, boundary and centroid predictions. It contains no detector so it is orthogonal to a standard instance segmentation design and can be used to improve the performance of a standard design. The presented custom designed model is verified on the Gland Segmentation in Colon Histology Images dataset.

5

Acoustic excitation of electric field in water solution NaCl

Avrunin Oleg G., Bondarenko Igor S., Bondarenko Stanislav I., Kuzmenko Yulia V., Pinaieva Olga Yu., Kisała Piotr, Tleshova Akmaral, Luganskaya Saule

Przegląd Elektrotechniczny

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2019

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R. 95, nr 4

158--161

EN

The electric field value has been measured in an electroconducting water solution with NaCl, arising at simultaneously action on it of ultrasound and a direct magnetic field. Basic approaches and scheme of the laboratory device are proposed and designed. The basic characteristics of ultrasonic radiation in a place of measurement of electric field are defined, proceeding from its value and the experimental installation parameters. It is possible to assume, that at constant values of intensity of radiation and a magnetic field the value of measured voltage in the set areas of a body will give the new quantitative information on an organism state. Possibility of use of measurements of electric field for studying of properties of the biological tissue is discussed.

PL

Wartość pola elektrycznego została zmierzona w elektroprzewodzącym roztworze wodnym z NaCl, powstającym przy równoczesnym oddziaływaniu na nie ultradźwiękami i bezpośrednim polem magnetycznym. Zaproponowano i zaprojektowano podstawowe podejścia i schemat urządzenia laboratoryjnego. Określono podstawowe właściwości promieniowania ultradźwiękowego w miejscu pomiaru pola elektrycznego, wychodząc z jego wartości i eksperymentalnych parametrów instalacji. Można założyć, że przy stałych wartościach natężenia promieniowania i pola magnetycznego wartość mierzonego napięcia w zadanych obszarach ciała da nową informację ilościową o stanie organizmu. Omówiono możliwości wykorzystania pomiarów pola elektrycznego do badania właściwości tkanki biologicznej.

6

Propagation of Gaussian Schell-model vortex beams in biological tissues

Duan Meiling, Tian Yannan, Li Jinhong

Optica Applicata

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2019

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Vol. 49, nr 2

203--215

EN

The dependence of changes in the relative intensity and the spectral degree of coherence on the refractive-index Cn2 of biological tissues, space correlation length σ0 and wavelength λ of the Gaussian Schell-model (GSM) vortex and non-vortex beams in biological tissues has been studied. It is shown that the intensity distribution of GSM vortex beams passing through the biological tissues undergoes several stages. The bigger Cn2 is, and the smaller σ0 is, the quicker the intensity evolution is. The attenuation of intensity for GSM vortex beams is much slower than that of non-vortex beams, thus the beam quality of the former is better than the latter. When propagating through the biological tissue, the phase singularities of GSM vortex beams will appear. As the propagation distance increases, the position of the phase singularities will shift, and these points will disappear where the changes in the spectral degree of coherence of GSM vortex beams are consistent with those of GSM non-vortex beams. At the same propagation distance, the bigger Cn2 is, and the smaller σ0 and λ are, the shorter the distance between the phase singularities and the z axis is, when the propagation distance z is in the range of 0–50 μm.

7

2D-Mueller-matrix tomography of optically anisotropic polycrystalline networks of biological tissues histological sections

Trifonyuk L., Baranowski W., Ushenko V., Olarc O., Dubolazov A., Ushenko Yu., Bodnar B., Vanchulyak O., Kushnerik L., Sakhnovskiy M.

Opto-Electronics Review

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2018

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Vol. 26, No. 3

252--259

EN

A new technique of Mueller-matrix mapping of the birefringent structure of biological preparations of human organs tissues is suggested. The algorithms of reconstruction of average values and magnitude of fluctuations of the phase (birefringence) and amplitude (dichroism) of optically anisotropic structure of myocardium and connective tissue component of the vaginal wall histological section are proposed.The magnitudes and ranges of changes in the statistical moments of the 1st-4th order that characterize the distribution of average values and magnitude of fluctuations of birefringence and dichroism of the myocardium and connective tissue of the vaginal tissues histological sections were determined. Joint studies of distributions of the characteristics of phase and amplitude of the anisotropy of myocardium and connective tissue component of the vaginal wall tissues of different states were performed. The cases of various necrotic changes in the myocardium and pathological conditions of the vagina wall (prolapse of the genitals) are examined. Balanced accuracy of the method of Mueller-matrix polarization-phase and diffuse tomography of optically anisotropic polycrystalline networks in the differentiation of necrotic and pathological changes in human organs is determined.

8

Changes in the polarization states of random electromagnetic vortex beams propagating in biological tissues

Duan M., Wu Y., Su N.

Optica Applicata

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2018

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Vol. 48, nr 2

297--309

EN

The changes in the on-axis polarization state of random electromagnetic Gaussian Schell-model vortex beams propagating in biological tissues have been studied. In different media propagation, the bigger Cn2 is, the earlier the appearance of the inflexion points in the on-axis degree of the polarization P(0, 0, z) is. As the propagation distance increases, the values of the on-axis orientation angle θ(0, 0, z) undergo several processes: at the beginning they are positive, then gradually increase to the maximum, jump to a negative value, finally tend to a fixed value. The bigger Cn2 corresponds to previous jumping position. In the entire propagation, the values of the on-axis ellipticity ε(0, 0, z) are larger than the initial one. There exists a phenomenon that the values of P(0, 0, z), θ(0, 0, z) and ε(0, 0, z) keep their extremes in a length of propagation distances for the far infrared beams. The maximum of P(0, 0, z) is the smallest and the jumping range of θ(0, 0, z) is the largest for the ultraviolet beams. Compared with σyy > σxx, the changes in magnitudes in P(0, 0, z) are more obvious when σyy < σxx, the changes in θ(0, 0, z) are just the reverse for σyy < σxx.

9

Multispectral method and means for determining the distance of the shot on the basis of the study of gunshot injuries of the skin tissues

Petruk V., Kvaternyuk S., Kvaternyuk O., Mokanyuk O., Petruk R., Mussubekov R., Wójcik W., Toigozhinova A., Kalizhanova A.

Przegląd Elektrotechniczny

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2017

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R. 93, nr 3

129--132

EN

The work carried out research and development of methods and means of multispectral vision measurement control and diagnosing of parameters of inhomogeneous biological media for biomedical diagnostics with the use of the n-dimensional multispectral data for each pixel of the array of digital images obtained by the CCD camera. Application results can use to diagnose the nature and severity of gunshot injuries to the biomannequins, biological and physiological properties of the skin tissues that are close to the morphological and functional characteristics of human.

PL

W pracy przedstawiono badania oraz opracowanie metod i środków multispektralnych pomiarów wizyjnych i diagnozowania parametrów niejednorodnych mediów biologicznych dla diagnostyki biomedycznej z wykorzystaniem wielospektralnych n-wymiarowych danych dla każdego piksela tablicy cyfrowych obrazów uzyskanych z aparatu z matrycą CCD. Wyniki aplikacji mogą być użyte, do diagnozowania rodzaju i skali obrażeń postrzałowych bio-manekinów, właściwości biologicznych i fizjologicznych tkanek skóry, zbliżonych do ludzkich cech morfologicznych i funkcjonalnych.

10

Assessment of the validity of the diagnosis of damage of tissues by multispectral method using neural network

Petruk V., Kvaternyuk S., Kvaternyuk O., Mokanyuk O., Petruk R., Vraysova S., Luganskaya S., Gromaszek K.

Przegląd Elektrotechniczny

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2017

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R. 93, nr 5

106--109

EN

In this paper is the expert system designed and analysed for diagnostic decision support solutions in the study of surface damage of tissues by using multispectral method and neural network to process the results. We have developed specialized software for administration personal data of patients in forensic examination of biological tissues of human skin and combination of data in common database with digital photos injuries. The researchers analyzed the operating parameters of a diagnostic test to assess the diagnostic accuracy of surface damage biological tissues based on advanced of multispectral method.

PL

W artykule opisano projekt I analizę systemu eksperckiego do wspierania decyzji przy badaniu uszkodzeń powierzchni tkanek z użyciem metod wielospektralnych i sieci neuronowych. Zostało opracowane specjalistyczne oprogramowanie do zarządzanie danymi pacjentów w badaniach sądowych skóry ludzkiej i kombinacji we wspólnej bazie danych cyfrowych fotografii ran. Zbadane zostały parametry operacyjne testów diagnostycznych w celu oszacowania ich dokładności oceny uszkodzeń tkanek metodą multispektralną.

11

Governing Differential Equations for the Mechanics of Undamageable Materials

Voyiadjis G. Z., Kattan P. I.

Engineering Transactions

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2014

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Vol. 62, iss. 3

241–-267

EN

In this work the mathematical foundations of the mechanics of elastic undamageable materials are presented. In particular the governing differential equations are derived for both the scalar and tensorial cases. In the isotropic case it is found that the resulting scalar differential equations are simple and easy to solve. However, in the anisotropic case the tensorial differential equations are complicated and unsolvable at this time. The current work presents the solution in the form of explicit nonlinear stress-strain relations for the simple one-dimensional case. However, the general solution of the three-dimensional case remains unattainable at the present time. Only the governing tensorial differential equations are derived for this latter case. It is to be noted that the term “undamageable” is reflected in the context of the material stiffness and not the property of indestructibility due to various loading conditions. Thus, the undamageable material reflects that no microcracks or microvoids occur as well as no plastic yielding in the material. To illustrate this concept, a last section is added on applications.

12

Modeling of temperature field inside the tissue with a blood vessel using the BEM-FDM algorithm

Majchrzak E., Borowska J., Klekot J., Tarasek D.

Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej

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2012

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Vol. 11, nr 4

85-92

EN

The thermal interactions between the blood vessel and surrounding biological tissue are analyzed. The tissue temperature is described by the Pennes equation, while the equation determining the change of blood temperature along the blood vessel is formulated on the basis of adequate energy balance. These equations are coupled by a boundary condition given at the blood vessel wall. The problem is solved using the hybrid algorithm, this means the temperature field in biological tissue is determined by means of the boundary element method (BEM), while the blood temperature is determined by means of the finite difference method (FDM). In the final part the examples of computations are presented.

13

Sensitivity of tissue freezing process on changes of time-dependent cryoprobe tip cooling rate

Mochnacki B., Siedlecki J.

Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej

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2011

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Vol. 10, nr 2

191-197

EN

In the paper, the problems of thermal interactions between skin tissue and a cylindrical cryoprobe tip are discussed. The cryoprobe tip temperature is time-dependent and its changes from the initial temperature to the final one and back are assumed in the form of a broken line (successive sectors correspond to cooling and heating processes or cooling and heating ones divided by a horizontal sector (a constant freezing temperature)). The aim of the considerations resolves itself in the analysis of dependences between the tip cooling (heating) rate and the course of the freezing process. To solve the problem, the direct approach of sensitivity analysis is used. The mathematical model of freezing is based on the energy equation corresponding to the 'fixed domain method' in which a parameter called 'the substitute thermal capacity' appears. The sensitivity model results from the differentiation of energy equation and boundary-initial conditions with respect to the cooling (heating) rate. At the stage of computations, the finite differences method (FDM) is used. In the final part of paper, examples of computations are presented.

14

Numerical analysis of heat transfer in countercurrent blood flow and biological tissue

Majchrzak E., Tarasek D.

Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej

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2011

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Vol. 10, nr 2

143-153

EN

Bioheat transfer in biological tissue is described by the Pennes equation, while the change of blood temperature along the artery and vein is described by ordinary differential equations, at the same time the countercurrent blood flow is taken into account. The coupling of these equations results from the boundary conditions given by the blood vessel walls. There are two methods used here in order to calculate the temperatures along the blood vessels and across biological tissue. To solve the Pennes equation, the Multiple Reciprocity Boundary Element Method (MRBEM) is applied. It should be pointed out that this method does not require discretisation of the interior of the domain. The second method used in this paper is the Finite Difference Method (FDM) and it is applied to calculate the temperatures along the blood vessels, and it complements the previous one. It is important to note that the diameter of an artery is smaller than of a vein, which results from the physiological characteristics of these blood vessels. In the final part of the paper, the results of the computations are shown and conclusions are formulated.

15

Application of BEM for numerical solution of thermal wave model of bioheat transfer

Kałuża G., Ładyga E.

Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej

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2011

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Vol. 10, nr 1

83-91

EN

The thermal wave model of bioheat transfer supplemented by boundary and initial conditions is considered. To solve the problem, the boundary element method (BEM) is proposed. In the final part of the paper examples of numerical computations concerning the determination of the temperature field in a heating tissue are shown.

16

Monitoring of brain tumor evolution using impedance tomography

Ostanina K., Dědková J.

Prace Instytutu Elektrotechniki

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2011

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Z. 252

87-92

EN

The paper proposes new technique for a non-invasive monitoring of local changes in a biological tissue based on impedance tomography. The injected current causes apart of the electric field inside the given object also the magnetic field. The new algorithm for conductivity image reconstruction, which uses the internal current information with respect to corresponding boundary conditions and one component of an external magnetic field, was developed. The internal conductivity distribution obtained using the proposed method is compared with those using conventional methods based on Electrical Impedance Tomography.

PL

Artykuł proponuje nową metodę nieinwazyjnej obserwacji lokalnych zmian tkanki biologicznej opartej na tomografii impedancyjnej. Wprowadzony prąd powoduje oprócz pola elektrycznego wewnątrz danego obiektu także powstanie pola magnetycznego. Został opracowany nowy algorytm do rekonstrukcji obrazu przewodności wykorzystujący informację od wewnętrznego prądu, odpowiednio do warunków brzegowych i jedną składową zewnętrzną pola magnetycznego. Rozkład wewnętrznej przewodności otrzymany przy użyciu proponowanej metody porównano z wynikami konwencjonalnych metod opartych na Elektrycznej Tomografii Impedancyjnej.

17

Numerical modelling of tissue heating by means of the electromagnetic field

Majchrzak E., Paruch M.

Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej

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2010

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Vol. 9, nr 1

89-97

EN

Electromagnetic field induced by two external electrodes and temperature field resulting from electrodes action in 3D domain of biological tissue is considered. External electric field causes the heat generation in tissue domain. The distribution of electric potential in domain considered is described by the Laplace equation, while the temperature field is described by the Pennes equation. These problems are coupled by source function being the additional component in Pennes equation and resulting from the electric field action. The boundary element method is applied to solve the coupled problem connected with the biological tissue heating. In the final part of the paper the examples of computations are shown.

18

Numerical modeling of tissue coagulation during laser irradiation controlled by surface temperature

Jasiński M.

Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej

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2010

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Vol. 9, nr 1

29-36

EN

The numerical analysis of thermal process proceeding in biological tissue during a laser irradiation controlled by surface temperature of tissue is presented. Heat transfer in the tissue is assumed to be transient and one-dimensional. The internal heat sources resulting from laser irradiation based on the Beer law are taken into account. Perfusion rate and effective scattering coefficient are treated as dependent on tissue injury. At the stage of numerical computations the boundary element method has been used. In the final part of paper the results obtained are shown.

19

Numerical modeling of heat transfer in a single blood vessel and surrounding biological tissue

Majchrzak E., Tarasek D.

Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej

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2010

|

Vol. 9, nr 2

145-152

EN

The thermal interactions between the single blood vessel and surrounding biological tissue are analyzed. The temperature in the tissue is described by the Pennes equation, while the equation determining the change of blood temperature along the blood vessel is formulated on the basis of adequate energy balance. These equations are coupled by boundary condition given at the blood vessel wall. There are two models considered here in terms of blood vessel types. First is the supplying vessel model and the other one is traversing vessel model. Both are distinguished in the computations. The solution of the problem has been provided by means of finite difference method.

20

Influence of cryoprobe cooling/heating rate on the course of freezing process

Mochnacki B., Siedlecki J., Tuzikiewicz W.

Prace Naukowe Instytutu Matematyki i Informatyki Politechniki Częstochowskiej

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2010

|

Vol. 9, nr 2

197-202

EN

The methods of sensitivity analysis are used in order to observe the influences of changes of the cryoprobe tip cooling/heating rate on a course of biological tissue freezing process. The temperature history of tip temperature is assumed in a form of broken line. The direct variant of sensitivity analysis is here applied. At the stage of numerical modeling the control volume method is used. In the final part of the paper the examples of computations are shown.