A Printed Antenna with an Infrared Temperature Sensor for a Medical Multichannel Microwave Radiometer

Vesnin, Sergey; Sedankin, M. K.; Гудков, А. Г.; Leushin, V. Yu.; Сидоров, И. А.; Porokhov, I. O.; Agasieva, S. V.; Vidyakin, S. I.

doi:10.1007/s10527-020-10011-9

Cited by 13 publications

(4 citation statements)

References 14 publications

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“…Note that earlier, it was shown 33 that not only chemical, but also mechanical excitation can lead to a change in the structure of water and the relationship between ortho-para-isomers of water. We have demonstrated that mechanical excitation of a uid near singular points can lead to microwave radiation from water 34 . The kinetics of microwave radiation differs from the thermal relaxation temperature variation of solutions upon mechanical excitation: thus, at a temperature near 4°C, a sharp increase in microwave radiation was observed, while the infrared temperature of the solution increased very slowly.…”

Section: Discussionmentioning

confidence: 99%

Monitoring Protein Denaturation of Egg White Using Passive Microwave Radiometry (MWR)

Goryanin

Ovchinnikov²,

Kobayashi³

et al. 2021

Preprint

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Passive microwave radiometry (MWR) is a measurement technique based on the detection of passive radiation in the microwave spectrum from different objects. This radiation in equilibrium is known to be proportional to the thermodynamic temperature of an emitting body. We hypothesize that living systems feature other mechanisms of emission that are based on protein unfolding and water rotational transitions. To understand the nature of these emissions, microwave radiometry has been used in several in vitro experiments. In our study, we performed pilot measurements of microwave emissions from egg whites during denaturation induced by ethanol. Egg whites are 10% proteins such as albumins, mucoproteins, and globulins. We found a novel phenomenon that microwave emissions changed without a corresponding change of the water thermodynamic temperature. increase 100 times faster than thermodynamic temperature. We have also found striking differences between microwave emission and thermodynamic temperature kinetics. Therefore, we hypothesize that these two processes are unrelated, contrary to what was thought before. It is known that some pathologies like stroke or brain trauma feature increased microwave emissions. We hypothesize that this phenomenon originates from protein denaturation and is not related to the thermodynamic temperature. So, our finding could explain first time the reason for microwave emissions increase after trauma and postmortem. It could be used for the development of novel diagnostics methods. The MWR method is inexpensive, and it does not require fluorescent or radioactive labels. It can be used in different areas of basic and applied pharmaceutical research, including kinetics studies in biomedicine.

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Section: Discussionmentioning

confidence: 99%

Monitoring Protein Denaturation of Egg White Using Passive Microwave Radiometry (MWR)

Goryanin

Ovchinnikov²,

Kobayashi³

et al. 2021

Preprint

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show abstract

“…Several printed antennas are currently known that meet these requirements and can be used for multi-channel and multi-frequency systems. The following classes of printed antennas can be distinguished: spiral antennas [6], elliptical antennas [21,22], patch antennas [23], slot antennas [24,25] and dipole or dipole printed antennas [26]. In [15], printed antennas are presented, the radiator of which has a «butterfly» shape.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Development and Optimization of an Ultra Wideband Miniature Medical Antenna for Radiometric Multi-Channel Multi-Frequency Thermal Monitoring

et al. 2020

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The article is devoted to the development of a printed ultra-wideband miniature antenna that can be used for microwave radiometry. An antenna design with a ring-shaped radiator has been proposed, which provides reception of microwave radiation from biological tissues in the 1800–4600 MHz range. The results of mathematical modeling of the antenna electromagnetic field in biological tissues using the finite difference time domain (FDTD) method are presented. Optimization of the antenna design has been carried out to ensure acceptable matching parameters and optimal antenna functionality. The developed antenna has a height of 6 mm and a calculated mass of 5 g; it is planned to manufacture a dielectric substrate based on PDMS polymer with the addition of barium titanate. The issues of calculating the antenna parameters (measurement depth, resolution and distribution of radiation power over the volume of biological tissue, sensitivity, etc.) are considered. The research results and design parameters of the developed antenna demonstrated the effectiveness of the new antenna and the possibility of its adaptation to the object of research. Considering the presence of an ultra-wide band and miniature dimensions, the antenna can be a sensor of a multi-frequency multi-channel microwave radiothermograph

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“…The z-axes (orthogonal to the antenna’s surface) are mostly dependent on the dielectric properties and frequency of the measured media, while the x-axes and y-axes are mostly dependent on the antenna’s dimensions. More details are provided in specialized publications [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…We use an RTMM radiometer (Medical Microwave Radiometry LTD, UK, accessed on 19 May 2022) with a round probe to measure microwave radiation from egg whites during alcohol-induced denaturation ( Figure 2 ). For a more detailed description of the technology, see [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Monitoring Protein Denaturation of Egg White Using Passive Microwave Radiometry (MWR)

Goryanin

Ovchinnikov²,

Vesnin³

et al. 2022

Diagnostics

View full text Add to dashboard Cite

Passive microwave radiometry (MWR) is a measurement technique based on the detection of passive radiation in the microwave spectrum of different objects. When in equilibrium, this radiation is known to be proportional to the thermodynamic temperature of an emitting body. We hypothesize that living systems feature other mechanisms of emission that are based on protein unfolding and water rotational transitions. To understand the nature of these emissions, microwave radiometry was used in several in vitro experiments. In our study, we performed pilot measurements of microwave emissions from egg whites during denaturation induced by ethanol. Egg whites comprise 10% proteins, such as albumins, mucoproteins, and globulins. We observed a novel phenomenon: microwave emissions changed without a corresponding change in the water’s thermodynamic temperature. We also found striking differences between microwave emissions and thermodynamic temperature kinetics. Therefore, we hypothesize that these two processes are unrelated, contrary to what was thought before. It is known that some pathologies such as stroke or brain trauma feature increased microwave emissions. We hypothesize that this phenomenon originates from protein denaturation and is not related to the thermodynamic temperature. As such, our findings could explain the reason for the increase in microwave emissions after trauma and post mortem for the first time. These findings could be used for the development of novel diagnostics methods. The MWR method is inexpensive and does not require fluorescent or radioactive labels. It can be used in different areas of basic and applied pharmaceutical research, including in kinetics studies in biomedicine.

show abstract

A Printed Antenna with an Infrared Temperature Sensor for a Medical Multichannel Microwave Radiometer

Cited by 13 publications

References 14 publications

Monitoring Protein Denaturation of Egg White Using Passive Microwave Radiometry (MWR)

Monitoring Protein Denaturation of Egg White Using Passive Microwave Radiometry (MWR)

Development and Optimization of an Ultra Wideband Miniature Medical Antenna for Radiometric Multi-Channel Multi-Frequency Thermal Monitoring

Monitoring Protein Denaturation of Egg White Using Passive Microwave Radiometry (MWR)

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