Showing papers by "Piotr Gas published in 2017"
TL;DR: The proposed approach provides a relatively simple method for optimization of the location and size of slots in the antenna structure and enables appropriate adjustment of temperature of the target tissue to preserve optimal cancer treatment.
40 citations
25 Jun 2017
TL;DR: In this paper, several well-known formulas for on-axis magnetic field inside ideal solenoid and compares them with the values obtained from the actual water-cooled coil for magnetic fluid hyperthermia (MFH) purpose.
Abstract: The paper lists several well-known formulas for on-axis magnetic field inside ideal solenoid and compares them with the values obtained from the computer simulation of the actual water-cooled coil for magnetic fluid hyperthermia (MFH) purpose. Performed analysis of coupled electro-thermal problem using finite element method (FEM) may led to the estimation of impact of heat losses due to water cooling on temperature within a region of interest (ROI) for some important model parameters. It is shown that cold water circulating inside the copper windings cause significant cooling of such inductors. What is important, it enables convenient conditions for ferrofluid testing and reliable operation of temperature sensors placed inside helical coils.
16 citations
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TL;DR: In this article, the authors evaluated and compared temperature distributions for different tissues being treated at the time of interstitial microwave hyperthermia using a coaxial-slot antenna implemented into the tissue.
Abstract: The aim of this study was to evaluate and compare temperature distributions for different tissues being treated at the time of interstitial microwave hyperthermia. A coaxial-slot antenna implemented into the tissue is the source of microwave radiation. The described model takes into account the wave equation for the TM mode and the Pennes equation determining the temperature distribution within the tissue in the stationary case. The simulation results for the three fundamental microwave frequencies of tissue heating devices are presented.
13 citations
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TL;DR: The term hyperthermia is a combination of two Greek words: HYPER (rise) and THERME (heat) and refers to the increasing of body temperature or selected tissues in order to achieve a precise therapeutic effect as mentioned in this paper.
Abstract: The term hyperthermia is a combination of two Greek words: HYPER (rise) and THERME (heat) and refers to the increasing of body temperature or selected tissues in order to achieve a precise therapeutic effect. This paper reviews the development of thermotherapy by describing the most important moments in its history. For decades, the development of hyperthermia ran parallel with the development of cancer treatment and had numerous connections with electromedicine. Throughout its history, hyperthermia evoked a number of hopes, brought spectacular successes, but also was the subject of many disappointments.
12 citations
01 Jun 2017
TL;DR: In this paper, a method of permanently placing ferromagnetic particles in the tumor region for the duration of the treatment is presented, which is based on the phenomenon of magnetophoresis, that is, the influence of a magnetic field with a strongly variable gradient on magnetically induced magnetic moment of particle.
Abstract: This article presents a method of permanently placing ferromagnetic particles in the tumor region for the duration of the treatment. It is based on the phenomenon of magnetophoresis, that is, the influence of a magnetic field with a strongly variable gradient on magnetically induced magnetic moment of particle. The presented approach has a great importance in particle separation industry as well as in nanoparticle tumor targeting.
6 citations
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TL;DR: In this paper, a model of local interstitial microwave hyperthermia is presented, where a microwave coaxial-slot antenna placed in the liver tissue is the heat source, and the issue is a coupling of the electromagnetic field and the temperature field.
Abstract: A model which is an example of local interstitial microwave hyperthermia is presented. A microwave coaxial-slot antenna placed in the liver tissue is the heat source. Due to the axial symmetry of the model, for simplification a two-dimensional case is considered. The presented issue is therefore a coupling of the electromagnetic field and the temperature field. Using the finite element method, the wave equation for TM wave case and the bioheat equation under steady-state condition have been solved. At the end the obtained simulation results are presented.
1 citations
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TL;DR: In this paper, a simplified 2D model which is an example of regional RF hyperthermia is presented, where the human body is inside the wire with exciting current and the electromagnetic energy is concentrated within the tumor, and the analyzed model is therefore a coupling of the electromagnetic field and the temperature field.
Abstract: A simplified 2-D model which is an example of regional RF hyperthermia is presented Human body is inside the wire with exciting current and the electromagnetic energy is concentrated within the tumor The analyzed model is therefore a coupling of the electromagnetic field and the temperature field Exciting current density in human body has been calculated using the finite element method, and then bioheat equation in timedepended nonstationary case has been resolved At the and obtained results are presented