Magnetically mediated thermoacoustic imaging toward deeper penetration

Feng, Xiaohua; Gao, Fei; Zheng, Yuanjin

doi:10.1063/1.4819391

Cited by 80 publications

(60 citation statements)

References 23 publications

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“…It is noticed that the MAT system without a static magnetic field is much similar to the thermoacoustic tomography (TAT) [12][13][14][15] system. In TAT, tissues absorb a small fraction of incident pulsed microwave energy and consequently produce the ultrasonic emission thermal-elastically.…”

Section: Introductionmentioning

confidence: 89%

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Experimental study of the thermoacoustic effect in magnetoacoustic tomography

Zhou

Zhang

et al. 2016

AIP Advances

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A utility piezoelectric energy harvester with low frequency and high-output voltage: Theoretical model, experimental verification and energy storage AIP Advances 6, 095208 (2016) Magnetoacoustic tomography (MAT) is an emerging noninvasive electrical conductivity imaging that combines the high dielectric contrast of tissues and excellent resolutions of ultrasonography. In this paper, we have found the thermoacoustic (TA) effect in the measurement of MAT. Several materials with different conductivities have been measured by a MAT system with and without a static magnetic field. The acoustic signals have been analyzed and compared in the time domain and the frequency domain, respectively. It is found that the TA effect is related to the material characteristics. For the tissue-like materials with low conductivities, the TA signals caused by the TA effect are observable and cannot be ignored in the time and frequency domains. It means that the TA effect of biological tissues should be considered in MAT system in the future. © 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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Section: Introductionmentioning

confidence: 89%

“…Without the static magnetic field, the forward formula of TAT based on the source of joule heating is written as Eq. (2): [12][13][14] …”

Section: Methodsmentioning

confidence: 99%

Experimental study of the thermoacoustic effect in magnetoacoustic tomography

Zhou

Zhang

et al. 2016

AIP Advances

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“…Exogenous contrast agents with enhanced microwave absorption can potentially enable imaging at deeper region [3], but their toxicity for humans remains unclear. To provide deeper penetration and exploit the fact that most objects, including human body, are non-magnetic, we propose to adopt radio frequency magnetic field for performing thermoacoustic imaging [4]. Termed as magnetically mediated thermoacoustic imaging, it utilizes a large transient radio frequency magnetic field to illuminate the objects under study, depositing a time varying electric field inside the objects.…”

Section: Introductionmentioning

confidence: 99%

Magnetically mediated thermoacoustic imaging and technical considerations on its coil design

Feng

Gao

Zheng

2013

2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applicati

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Magnetically mediated thermoacoustic imaging exploits the electromagnetic spectrum of radio frequency magnetic field under 20 MHz to perform thermoacoustic imaging, which can provide deeper penetration than microwave or light irradiation. To achieve effective imaging, current implementation relies on magnetic resonance of the coil to deliver sufficiently strong magnetic field into conductive objects, including tissues. Different kind of coils can be utilized, which affects both the magnetic field distribution and the design of the resonance circuits. We investigated here those various coils and their implications for the imaging system. Preliminary thermoacoustic signal generation and imaging results are also presented.Index Terms -biomedical imaging, coil design, magnetic field, thermoacoustic effects.

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“…With the publication of above reports, more and more researchers are aware of the advantages of TAI and put their e®orts into improving TAI system. Nowadays, the main TAI groups in this¯eld are Patch et al, [28][29][30][31][32][33] Ntziachristos et al, [34][35][36][37] Jiang et al, [38][39][40][41][42][43] Xin et al, [44][45][46][47][48][49] Arbabian et al, 50,51 Zheng et al, [52][53][54] Xing et al [80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98] and others. Under the e®orts of these researchers, the excitation source, data acquisition system and image algorithm have been improved greatly, and it can be revealed that TAI is e±cient in detecting the area with anomalous microwave absorption in biological tissue, particularly for breast cancer.…”

Section: Introductionmentioning

confidence: 99%

A review of microwave-induced thermoacoustic imaging: Excitation source, data acquisition system and biomedical applications

Cui

Yuan

2017

J. Innov. Opt. Health Sci.

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Microwave-induced thermoacoustic imaging (TAI) is a noninvasive modality based on the differences in microwave absorption of various biological tissues. TAI has been extensively researched in recent years, and several studies have revealed that TAI possesses advantages such as high resolution, high contrast, high imaging depth and fast imaging speed. In this paper, we reviewed the development of the TAI technique, its excitation source, data acquisition system and biomedical applications. It is believed that TAI has great potential applications in biomedical research and clinical study.

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Magnetically mediated thermoacoustic imaging toward deeper penetration

Cited by 80 publications

References 23 publications

Experimental study of the thermoacoustic effect in magnetoacoustic tomography

Experimental study of the thermoacoustic effect in magnetoacoustic tomography

Magnetically mediated thermoacoustic imaging and technical considerations on its coil design

A review of microwave-induced thermoacoustic imaging: Excitation source, data acquisition system and biomedical applications

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