Archives of Electrical Engineering

Gas, Piotr; Wyszkowska, Joanna

doi:10.24425/aee.2019.129339

Cited by 5 publications

(1 citation statement)

References 28 publications

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“…This thermal damage Ω can further be converted into a new evaluating index, the degree of tissue injury α, which have a value range between "0" with no damage and "1" with a complete damage to tumor cells [40] α(x, y, z,t) = 1 − e [−Ω (x,y,z,τ)] .…”

Section: Heat Transfer and Thermal Damage Modelmentioning

confidence: 99%

Effect of bio-tissue deformation behavior due to intratumoral injection on magnetic hyperthermia

Tang¹,

Zou²,

Flesch³

et al. 2023

Chinese Phys. B

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Thermal damage of malignant tissue is generally determined not only by the characteristics of bio-tissues and nanoparticles but also the nanofluid concentration distributions due to different injection methods during magnetic hyperthermia. The latter has more advantages in improving the therapeutic effect with respect to the former since it is a determining factor for the uniformity of nanofluid concentration distribution inside the tumor region. This study investigates the effect of bio-tissue deformation due to intratumoral injection on the thermal damage behavior and treatment temperature distribution during magnetic hyperthermia, in which both the bio-tissue deformation due to nanofluid injection and the mass diffusion after injection behavior are taken into consideration. The nanofluid flow behavior is illustrated by two different theoretical models in this study, which are Navier–Stokes equation inside syringe needle and modified Darcy’s law inside bio-tissue. The diffusion behavior after nanofluid injection is expressed by a modified convection–diffusion equation. A proposed three-dimensional liver model based on the angiographic data is set to be the research object in this study, in which all bio-tissues are assumed to be deformable porous media. Simulation results demonstrate that the injection point for syringe needle can generally achieve the maximum value in the tissue pressure, deformation degree, and interstitial flow velocity during the injection process, all of which then drop sharply with the distance away from the injection center. In addition to the bio-tissue deformation due to injection behavior, the treatment temperature is also highly relevant to determine both the diffusion duration and blood perfusion rate due to the thermal damage during the therapy.

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Section: Heat Transfer and Thermal Damage Modelmentioning

confidence: 99%

Effect of bio-tissue deformation behavior due to intratumoral injection on magnetic hyperthermia

Tang¹,

Zou²,

Flesch³

et al. 2023

Chinese Phys. B

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Modelling the temperature-dependent RF ablation produced by the multi-tine electrode

Gas

2020

ELECTROTECHNICAL REVIEW

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Efficient Methods for Solving Electromagnetic Wave Scattering From Dielectric Objects Using the Method of Moments With the Interpolation Fast Fourier Transform Method

Ahmad

2024

Telecom Rad Eng

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The method of moments discretizes an integral equation and produces a matrix. The computational complexity of using direct inversion is proportional to O(N3) and O(N2) for the number of operation and memory requirements, respectively, where N is the number of unknowns in a problem. Hence, iterative methods are used when the computational complexity is proportional to O(N2). If the integral is discretized on a uniform grid, the resultant matrix is Toeplitz and the matrix-vector product can only be performed using the fast Fourier transform (FFT) method with O(N log N) operations and memory requirements of O(N). Unfortunately, for realistic problems, this is rarely the case since the irregularity of realistic shapes leads to a non-uniform grid; therefore, the FFT method is not applicable. In this study, cubic spline interpolation was used successfully in two different ways to obtain a Toeplitz matrix if the dielectric object was homogenous or a matrix containing Toeplitz submatrices if the dielectric object was inhomogeneous. The results obtained when applying these methods to solve electromagnetic scattering from two- and three-dimensional dielectric objects showed that both approaches are accurate and efficient.

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Archives of Electrical Engineering

Cited by 5 publications

References 28 publications

Effect of bio-tissue deformation behavior due to intratumoral injection on magnetic hyperthermia

Effect of bio-tissue deformation behavior due to intratumoral injection on magnetic hyperthermia

Modelling the temperature-dependent RF ablation produced by the multi-tine electrode

Efficient Methods for Solving Electromagnetic Wave Scattering From Dielectric Objects Using the Method of Moments With the Interpolation Fast Fourier Transform Method

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