Physical and computer-based modeling in internal temperature reconstruction by the method of passive acoustic thermometry

Аносов, А. А.; Subochev, Pavel; Mansfel’d, A. D.; Sharakshane, A. A.

doi:10.1016/j.ultras.2017.09.015

Cited by 10 publications

(9 citation statements)

References 29 publications

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“…This method allows distinguishing weak noise signals, which include thermal acoustic radiation, against the background of the receiver's natural noise. Detailed analysis of the modulation AT based on the results of [3][4][5][6] showed that the minimum detected temperature difference is much worse than the maximum allowable one calculated theoretically. In addition to this drawback, such an AT has limited application due to the need for a priori knowledge of frequency-dependent absorption coefficients and measurements at two frequencies.…”

Section: Literature Review and Problem Statementmentioning

confidence: 81%

Experimental researching of biological objects noninvasive passive acoustothermometry features

Didkovskyi

Naida

Drozdenko

et al. 2020

EEJET

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Radio and acoustic thermometry allow measuring the temperature of internal tissues at depths of several centimeters, which is of interest in early diagnosis of diseases, hearing diagnostics, identifying inflammatory processes, monitoring physiotherapy procedures, conducting surgical operations accompanied by patient cooling, long-term control of the engraftment process of transplanted organs, monitoring treatment of malignant neoplasms by hyperthermia and thermal ablation methods, as well as using synergistic effects in oncology.In the acoustothermometry research method, the internal temperature is measured by receiving and recording

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Section: Literature Review and Problem Statementmentioning

confidence: 81%

Experimental researching of biological objects noninvasive passive acoustothermometry features

Didkovskyi

Naida

Drozdenko

et al. 2020

EEJET

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“…Anosov et al in 2005 used acoustothermometery for measuring the temperature distribution of biological tissue [51]. In [57], the authors in this study consider that the measured temperature should satisfy the heat equation. Accordingly, estimation of initial temperature and thermal diffusivity can be sufficient in temperature estimation problem.…”

Section: ∝ 2 (15)mentioning

confidence: 96%

A Review of Ultrasound Thermometry Techniques

Amiri¹,

Makkiabadi²

2020

fbt

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Acoustic thermometry is one of non-invasive methods to measure the temperature inside tissue area. Especially, when using the thermal therapy techniques such as High Intensity Focused Ultrasound (HIFU) and other thermal based methods, thermal assessment of heated area seems to be necessary. Some of acoustic properties of medium are temperature dependent; therefore, evaluation of temperature dependent parameters will be an indirect and non-invasive approach in thermometry. In this paper some of thermometry methods based on changes in acoustic properties of medium have been reviewed. The published methods are classified in two main categories: passive and active thermometry. In the passive thermometry, the thermal measurement probes, induced no acoustic signals to the medium, but they receive the radiated signals from the heated medium. In active method, the thermometry probe transmits a signal into the heated region and receives the echoes, then the received RF signals are processed in order to measure the temperature.

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“…The frequency ranges defined as fi (_-^+)∆f(where fi=1,2,3,4 MHz and ∆f=0.5MHz) which is measured at various frequency ranges of the area of the surface below the spectral curve. These bands are chosen according to the central frequency and frequency response of the measuring probe to cover its pass-band uniformly similar to the reported bands in the previously performed researches [2,13].…”

Section: Temperature Estimation Processmentioning

confidence: 99%

“…The passive acoustic temperature was calculated for four frequency ranges, which were mentioned before, using the following Equation 2 [13]:…”

Section: Temperature Estimation Processmentioning

confidence: 99%

“…On the other hand, the passive thermometry methods are very interesting because the measuring device does not emit any ultrasound wave to the target tissue and only records the inherent radiation produced by thermal chaotic movement of tissue atoms. In many types of researches [1][2][3][4][5][6][7][8][9][10][11][12][13], such passive measurement methods are proposed. These methods are called as PAT, i.e.…”

Section: Introductionmentioning

confidence: 99%

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A Simulation Framework for Passive Acoustic Thermometry of Nonhomogeneous Materials

Amiri¹,

Ali²,

Boldaji³

et al. 2020

fbt

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Purpose: Internal temperature is a significant factor for medical diagnosis. There are several thermometric methods, including IR, MRI, and active ultrasonic thermometry, which have limitations for clinical applications. The new method in this field called Passive Acoustic Thermometry (PAT), which enhanced some of this limitation. PAT is a safe method for internal temperature estimation that works based on acoustic radiation of materials with a specific temperature. Several experimental studies have been carried out so far in the field of PAT. While, to the best of our knowledge, there is no simulation-based research for nonhomogeneous materials reported yet. In this article (for the first time) we proposed a simulation framework for evaluating the PAT methodologies in nonhomogeneous materials; also we proposed a new formulation for temperature estimation in PAT algorithm. Materials and Methods: This framework supports the generation of acoustic radiation, signal processing, parameter estimation, and temperature reconstruction processes. At the moment the proposed framework estimates the temperature in the frequency domain and uses the frequency spectrum of the acquired ultrasound signals captured by a single transducer. Using the proposed framework, we tried to implement the previously practical experiments and the results of the simulation are consistent with those of the practical experiments. Also, we proposed the formulation that improves the error of temperature estimation. Results: We study 6 scenarios, including 2 environments with a target at 3 different temperatures. The average error of the proposed formulation in two different nonhomogeneous materials for three different temperatures is less than 0.25°C. Conclusion: The results show that the proposed formulation is the best estimation in the formula that has been introduced until now and compare with the previous study the accuracy is enhanced 54% (from 0.79 to 0.36 deg.). Therefore, the proposed formula enhanced PAT accuracy for temperature estimation. Also, the results show that it is possible to use this framework to evaluate the PAT in different scenarios. Therefore, this method enhances the possibility of examination of different conditions and algorithms. It also reduces the cost of practical experiment.

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Physical and computer-based modeling in internal temperature reconstruction by the method of passive acoustic thermometry

Cited by 10 publications

References 29 publications

Experimental researching of biological objects noninvasive passive acoustothermometry features

Experimental researching of biological objects noninvasive passive acoustothermometry features

A Review of Ultrasound Thermometry Techniques

A Simulation Framework for Passive Acoustic Thermometry of Nonhomogeneous Materials

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