Microwave system and methods for combined heating and radiometric sensing for blood perfusion measurement of tissue

Tofighi, Mohammad; Pardeshi, Jayendrasingh R; Maicke, Brian A.

doi:10.1109/mwsym.2016.7540197

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…Microwave techniques in the frequency range of hundreds of MHz to a few GHz will continue to be developed in therapeutic medicine due to their noninvasive, localized control and remote heating features [589], for biomedical instruments such as blood profusion measurements [590], [591], [592], and for cosmetic surgery such as the 2.45-GHz microwave-aided tumescent liposuction [593], [594]. Integration in treatment instruments, including for the creation of cavities in solid tumors which will allow for the introduction of high-dose chemotherapy, at dosages that cannot safely be applied systemically today, will create more clinical applications.…”

Section: Hyperthermia In Medicinementioning

confidence: 99%

Applications of Microwaves in Medicine

Chiao

Lin

et al. 2023

IEEE J. Microw.

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Advances and updates in medical applications utilizing microwave techniques and technologies are reviewed in this paper. The article aims to provide an overview of enablers for microwave medical applications and their recent progress. The emphasis focuses on the applications of microwaves, in the following order, for 1) signal and data communication for implants and wearables through the human body, 2) electromagnetic energy transfer through tissues, 3) noninvasive, remote or in situ physical and biochemical sensing, and 4) therapeutic purposes by changing tissue properties with controlled thermal effects. For signal and data communication and wireless power transfer, implant and wearable applications are discussed in the categories of pacemakers, endoscopic capsules, brain interfaces, intraocular, cardiac and intracranial pressure sensors, neurostimulators, endoluminal implants, artificial retina, smart lenses, and cochlear implants. For noninvasive sensing, remote vital sign radar, biological cell probing, magnetic resonance and microwave imaging, biochemical, blood glucose, hydration and biomarker sensing applications are introduced. For therapeutic uses, the developments of microwave ablation, balloon angioplasty, and hyperthermia applications are reviewed. The scopes of this article mainly concentrate on the research and development efforts in the past 20 years. Recent review articles on specific topics are cited with accomplishment highlights and trends deliberated. At the end of this article, a brief history of the IEEE Microwave Theory and Techniques Society (MTT-S) Biological Effects and Medical Applications committee and the contributions by its members to the promotion and advancement of microwave technologies in medical fields are chronicled.

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Section: Hyperthermia In Medicinementioning

confidence: 99%

Applications of Microwaves in Medicine

Chiao

Lin

et al. 2023

IEEE J. Microw.

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“…A square-law detector is commonly used in the radiometers, because it is a linear detector in which the output voltage (

) is linearly proportional to input power (

in Figure 1 ) as

where

is the detector sensitivity (V/W). Logarithmic detectors can be assumed as linear for a limited input power range [ 15 , 17 ]. By combining (1) and (2), we obtain

where

(V/K) represents total system gain including detector sensitivity, given as

.…”

Section: Design Of Radiometermentioning

confidence: 99%

“…Basically, square-law detectors with high sensitivity are commonly used in radiometers, since radiometer calibration is based on the linear relation between power and voltage as described in Section 2.1 . There are several studies where the logarithmic detector with wide dynamic range was used in the radiometers [ 15 , 17 ]. It can be assumed to be linear in the limited power range for easy calibration.…”

Section: Design Of Radiometermentioning

confidence: 99%

See 1 more Smart Citation

Total Power Radiometer for Medical Sensor Applications Using Matched and Mismatched Noise Sources

Park

Jeong

2017

Sensors

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This paper presents a simple total power radiometer to noninvasively measure the temperature of the human body. The proposed 3-GHz radiometer consists of an antenna collecting the noise power generated by a target, a low-noise and high-gain receiver amplifying the noise power, and a detector converting the noise power to voltage. A single-pole-triple-throw (SP3T) switch is placed between the antenna and the receiver, while a personal computer is used to control the SP3T switch, collect and process the data such as detector output voltages and physical temperatures of the reference noise sources and the target. The fabricated radiometer shows a good performance agreement with a thermometer in the temperature measurement of water from 25.0 to 43.1 °C. For the accurate prediction of the target temperature, the radiometer is calibrated adaptively to the environment and radiometer variations. For this purpose, two reference noise sources (hot and cold) are proposed using matched and mismatched resistors at room temperature. These resistor-based noise sources offer a reliable performance without complex temperature control systems. Furthermore, they can be easily calibrated in real time by periodically measuring the physical temperatures of the resistors. In addition, the logarithmic detector with wide dynamic range is adopted and logarithmically-fitted based on the measurement results instead of linear approximation, which reduces the error caused by the limited dynamic range of resistor-based noise sources. In order to further increase the accuracy, the performance imbalances between ports in the SP3T switch are also taken into account by employing offsets in the radiometer output voltages.

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“…The developed European and American countries generally have sound heating systems and hot water charging standards built based on heat consumption [4][5][6]. In China, after going through a few stages of initial exploration, technology upgrade, pilot demonstration, international cooperation, and gradual promotion, the adopted heating metering and charging management strategies have achieved obvious energy-saving effect, the heat sharing has certain social fairness, but for the related techniques and standards, there're still much room for improvement [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

An Individual Household-Based Heating Metering and Charging Management System for Central Heating in Community Residential Buildings

Zhang¹

2021

IJHT

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The optimization of heating metering method in the heating season has very important and practical value for energy saving and emission reduction, however, existing studies haven’t comprehensively analyzed the heating metering and charging management systems adopted by residential buildings with adjustable heat supply, and the problem of fair heat sharing hasn’t been well solved yet. To fill in this research gap, this paper designed an individual household-based heating metering and charging management system. At first, the paper gave the structure of the system and introduced the system functions, then, it analyzed the hydraulic characteristics of the heating system and the influence on the heat dissipation volume of the radiator, and constructed the heating metering and heat distribution model. At last, the paper proposed a scheme for heating metering and heat sharing in cases of normal operation and on-off heating adjustment of individual household radiator, and the effectiveness of the proposed scheme was verified via experimental results.

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Microwave system and methods for combined heating and radiometric sensing for blood perfusion measurement of tissue

Cited by 10 publications

References 8 publications

Applications of Microwaves in Medicine

Applications of Microwaves in Medicine

Total Power Radiometer for Medical Sensor Applications Using Matched and Mismatched Noise Sources

An Individual Household-Based Heating Metering and Charging Management System for Central Heating in Community Residential Buildings

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