A Core Body Temperature Retrieval Method for Microwave Radiometry When Tissue Permittivity is Unknown

Tisdale, Katrina; Bringer, Alexandra; Kiourti, Asimina

doi:10.1109/jerm.2022.3171092

Cited by 7 publications

(8 citation statements)

References 22 publications

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“…The research above indicates that the accuracy of weight function calculation is closely linked to the near-field radiation pattern, size, measuring distance, and angle of the temperature measuring antenna when measuring skin tissue temperature under near-field conditions. Additionally, changes in the dielectric characteristics of human tissue can also affect the weight function, leading to further deterioration in inversion accuracy [33][34][35]. Furthermore, the total radiation power received by the antenna is determined by the combined radiation power of the environment, clothing, and skin tissues.…”

Section: Near-field Temperature Contribution Weight Function Measurem...mentioning

confidence: 99%

Review of Accurate Detection of Human Skin Tissue Temperature Based on Microwave Radiation Method

Wu,

Liu

2024

Preprint

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Microwave radiation diagnosis technology can detect thermal changes in skin tissue earlier than anatomical changes, but its detection accuracy is limited by non-target radiation interference in the measurement environment, additional measurement errors of system units, and energy scattering and transmission between skin tissues. This paper aims to address the scientific challenges of analyzing the forward and inversion modelling detection mechanism of layered accurate temperature measurement of human skin tissue based on multi-band. The study focuses on the construction of a pencil beam antenna optimization system, the optimization strategy of high-sensitivity correlated radiometer architecture, and the high-precision multi-band forward and inversion modelling detection algorithm. The key technologies include: (1) A new method of integrated modeling and multi-index optimization of antenna with high directivity and small aperture is proposed, and a priori knowledge-guided neural network of pencil beam distribution is constructed to realize the inversion model of antenna structural parameters; (2) The influence mechanism of high sensitivity correlated radiometer architecture error is analyzed, and a periodic phase shift error correction algorithm based on uniform polar circle is designed; (3) Combining deep learning theory and hyper-parameter optimization framework, an iterative model is established, and the objective function modified by the penalty factor is defined to realize a new detection method combining forward and inversion. This paper presents a theoretical foundation for the industrialization of microwave radiation diagnostic technology.

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Section: Near-field Temperature Contribution Weight Function Measurem...mentioning

confidence: 99%

Review of Accurate Detection of Human Skin Tissue Temperature Based on Microwave Radiation Method

Wu,

Liu

2024

Preprint

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show abstract

“…However, this model, as shown in [20], turned out to be insufficiently accurate and required tuning based on the statistics of population variations in the population for a wide range of frequencies. Therefore, in [21], corrections were developed based on the results of experimental measurements, which made it possible to correct the coherent model for a particular region of the United States. The introduction of these corrections into the coherent model made it possible to increase the accuracy of measuring the temperature of the human head so that the results of radiometry were within the clinically acceptable error range (±0.5 ℃) [21].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Therefore, in [21], corrections were developed based on the results of experimental measurements, which made it possible to correct the coherent model for a particular region of the United States. The introduction of these corrections into the coherent model made it possible to increase the accuracy of measuring the temperature of the human head so that the results of radiometry were within the clinically acceptable error range (±0.5 ℃) [21]. However, the authors of [20,21] cannot guarantee the accuracy of human head temperature measurements using the coherent model refined in this way in other regions of the United States and in other countries of the world.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The introduction of these corrections into the coherent model made it possible to increase the accuracy of measuring the temperature of the human head so that the results of radiometry were within the clinically acceptable error range (±0.5 ℃) [21]. However, the authors of [20,21] cannot guarantee the accuracy of human head temperature measurements using the coherent model refined in this way in other regions of the United States and in other countries of the world. It should also be noted that the coherent model proposed in [20] and refined in [21] is based on the assumption that the aforementioned layers are absent on the human body during diagnostics.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…However, the authors of [20,21] cannot guarantee the accuracy of human head temperature measurements using the coherent model refined in this way in other regions of the United States and in other countries of the world. It should also be noted that the coherent model proposed in [20] and refined in [21] is based on the assumption that the aforementioned layers are absent on the human body during diagnostics. Therefore, the use of such models for the diagnosis of injuries in the workplace, in cases of natural or man-made disasters, as well as in military operations.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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The object of study is a three-layer model of a damaged human body. In the course of the study, it was found that the generally accepted three-layer model of a damaged human body is built, in particular, on the assumption that the characteristics of dressings remain unchanged over time. Therefore, the vast majority of modern research in the field of passive radiometry requires the removal of such materials from the human body during the measurement or considers their characteristics to be unchanged and insignificant. Questions of a possible change in the results of measuring the radiation of the human body due to the use of plaster casts of varying degrees of humidity remain almost unexplored. As a result of the study, the mathematical three-layer model of the damaged human body was refined. An element was introduced into the model that describes the dependence of the attenuation of radio wave energy on the relative humidity of the plaster cast. The refined model makes it possible to increase the accuracy of measuring the temperature of the human body, taking into account the time of applying a plaster cast to it. Unlike the existing ones, the proposed model is based on an experimental study that simulates the measurement of the radiation of a human body with a plaster cast of different degrees of humidity. To refine the model, the obtained experimental data were processed by regression analysis methods. The results of processing the experimental data made it possible to establish the specific type and value of the coefficients of the desired dependence. The use of the obtained results of the study proves the possibility of remote non-invasive express diagnostics of the state of the human body in the presence of plaster-gauze bandages. Providing such an opportunity allows disaster medicine workers to increase the ability to fulfill the so-called “golden hour rule”, as well as to clarify the requirements for a medical radiothermal mapping system

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Design and implementation of high sensitivity microwave radiometer

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A Core Body Temperature Retrieval Method for Microwave Radiometry When Tissue Permittivity is Unknown

Cited by 7 publications

References 22 publications

Review of Accurate Detection of Human Skin Tissue Temperature Based on Microwave Radiation Method

Review of Accurate Detection of Human Skin Tissue Temperature Based on Microwave Radiation Method

Refinement of three-layer model of a damaged human body for the case of changing the moisture of the banding material

Design and implementation of high sensitivity microwave radiometer

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