Microwave Non-Invasive Temperature Monitoring Using Uwb Radar for Cancer Treatment by Hyperthermia

Int. J. Microw. Wireless Technol.

Helbig

et al. 2020

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The temperature dependence of the dielectric parameters of tissues and tissue-mimicking phantoms is very important for non-invasive temperature measurement in medical applications using microwaves. We performed measurements of this dependence in the temperature range of 25–50°C using distilled water as a reference liquid commonly used in dielectric property studies. The results were compared with the literature model in the frequency range of 150–3000 MHz. Using this method, the temperature dependence of dielectric parameters of a new muscle tissue-mimicking phantom based on agar, polyethylene powder, and polysaccharide material TX-151 was measured in the temperature range of 25–50°C. The temperature dependence of the dielectric properties of this new muscle phantom was fitted to that of the two-pole Cole–Cole model and the deviation of the results between measured and modeled data was quantified.

Section: Introductionmentioning

confidence: 99%

Temperature dependent dielectric spectroscopy of muscle tissue phantom

Int. J. Microw. Wireless Technol.

Helbig

et al. 2020

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“…Nowadays heat therapy or thermotherapy is widely used for different medical applications. Generally, thermotherapy can be divided by temperature range to three approaches: diathermia (temperature increase by 1-3 °C, can help in treating neuralgia, muscle spasms and other physiotherapy applications by increasing blood flow), hyperthermia (temperature increase by 4-8 °C, is used as support therapy in cancer treatment) and thermal ablation (temperature increase by 20-30 °C, destroys tissues, can be used instead of open surgery in oncology) [1]. Hyperthermia therapy is of great interest for more than fifty years.…”

Section: Introductionmentioning

confidence: 99%

“…This differential signal information has to be analyzed in order to estimate tissue temperature changes inside the human body. Even small changes of relative permittivity (ε) and effective conductivity (σ) can be detected by ultra-wideband (UWB) technology [1].…”

Section: Introductionmentioning

confidence: 99%

Temperature Dependent Dielectric Properties of Tissue Mimicking Phantom Material in the Microwave Frequency Range

Prokhorova

2020 14th European Conference on Antennas and Propagation (EuCAP)

et al. 2020

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Microwave sensing represents a promising approach for non-invasive tissue temperature monitoring during hyperthermia treatment. Tissue mimicking phantom materials with corresponding dielectric properties and suitable for heating experiments are essential for preliminary methodical investigations as well as for the development of the measurement hardware. In the present paper, a fat tissue mimicking phantom material is investigated depending on the temperature in the range between 30 °C and 50 °C and the frequency range between 0.5 GHz and 7 GHz. The measured data are modeled by means of a two-pole Cole-Cole model and the temperature dependence of the Cole-Cole parameters is fitted by means of a second-order polynomial. The results show that this material imitate the dielectric properties of real fat tissue as well as its very low temperature dependence appropriately and can be used for practical experiments.

“…hyperthermia). In our previous work we presented the possibility to measure small changes caused by local heating by means of UWB Msequence radar [1]- [2]. Hyperthermia treatment is non-toxic treatment without side effects [2].…”

Section: Introductionmentioning

confidence: 99%

“…The non-invasive temperature measurement via UWB radar is based on the assumption that dielectric properties (relative permittivity and effective conductivity) of human tissues are temperature dependent [1]. The approach is based on the recording of backscattered signals UWB from the heated region.…”

Section: Introductionmentioning

confidence: 99%

Advanced Temperature Dielectric Spectroscopy Of Muscle Phantom At Microwave Frequencies

Kantova

2020 14th European Conference on Antennas and Propagation (EuCAP)

et al. 2020

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The temperature dependency of the dielectric properties of tissues is very important for the development of novel microwave systems intended for non-invasive temperature monitoring. This paper deals with the measurement and optimization of the temperature dependence of the dielectric parameters of a muscle tissue mimicking phantom. The measurements were performed in the frequency band 0.1-3 GHz and in the temperature range 25-45 °C. The differences in the dielectric parameters caused by temperature change were analyzed and compared with the reference.