Electromagnetic acoustic imaging

Emerson, Jane F.; Chang, Dolly S.; McNaughton, S.; Jeong, Jong Seob; Shung, K. K.; Cerwin, Stephen A

doi:10.1109/tuffc.2013.2572

Cited by 15 publications

(13 citation statements)

References 15 publications

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“…Besides EM absorption-based EMA techniques, many other EM force-related EMA methods including magnetoacoustic imaging with magnetic induction (MAT-MI) [ 137 , 138 , 139 ], magnetoacoustic imaging of superparamagnetic iron oxide nanoparticles (MAT-SPIONs), EM-induced shear wave imaging [ 140 ], magnetomotive ultrasound (MMUS) [ 141 ], and magnetomotive photoacoustic (MMPA) [ 142 ] have been developed based on their respect EM properties. In MAT-MI, a time-varying magnetic stimulation is applied to induce an eddy current in biological tissue.…”

Section: Prospects and Conclusionmentioning

confidence: 99%

“…In the presence of a static magnetic field, the generated Lorentz force causes transient mechanical vibration and produces detectable ultrasound signals [ 137 ]. When the imaging objects are replaced by extraneous magnetic nanoparticles, the generation of a magnetoacoustic wave in MAT-SPIONs relies on the magnetic translation force [ 138 ]. In both cases, the magnetic-field-induced force serves as the acoustic source, though MAT-MI reconstructs the electrical conductivity distribution and MAT-SPIONs map the extraneous nanoparticles distribution.…”

Section: Prospects and Conclusionmentioning

confidence: 99%

See 1 more Smart Citation

Electromagnetic–Acoustic Sensing for Biomedical Applications

Liu

Zhang

Zheng

et al. 2018

Sensors

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This paper reviews the theories and applications of electromagnetic–acoustic (EMA) techniques (covering light-induced photoacoustic, microwave-induced thermoacoustic, magnetic-modulated thermoacoustic, and X-ray-induced thermoacoustic) belonging to the more general area of electromagnetic (EM) hybrid techniques. The theories cover excitation of high-power EM field (laser, microwave, magnetic field, and X-ray) and subsequent acoustic wave generation. The applications of EMA methods include structural imaging, blood flowmetry, thermometry, dosimetry for radiation therapy, hemoglobin oxygen saturation (SO2) sensing, fingerprint imaging and sensing, glucose sensing, pH sensing, etc. Several other EM-related acoustic methods, including magnetoacoustic, magnetomotive ultrasound, and magnetomotive photoacoustic are also described. It is believed that EMA has great potential in both pre-clinical research and medical practice.

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Section: Prospects and Conclusionmentioning

confidence: 99%

Section: Prospects and Conclusionmentioning

confidence: 99%

Electromagnetic–Acoustic Sensing for Biomedical Applications

Liu

Zhang

Zheng

et al. 2018

Sensors

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“…1. The linear propagation of the sonic wave [20] avoids the current dispersion effect; therefore, a high-resolution measurement of the current can be achieved by locating the sonic source [21]. Bioelectrical current monitoring obtained valuable information from MA imaging.…”

Section: Introductionmentioning

confidence: 99%

A preliminary in vivo study of a method for measuring magneto-acoustic sonic source under electrical stimulation

Zhang¹,

Ma²,

Zhou³

et al. 2020

THC

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BACKGROUND: Stimulating current distribution in the tissue is unknown due to the complex distribution. OBJECTIVE: A preliminary in vivo measurement of the magneto-acoustic (MA) signal of the human finger is performed in this study. The approach for locating the magneto-acoustic source of the stimulating current is studied. METHODS: We use a lock-in amplifier to measure the MA signal under continuous wave electrical stimulation. The phase of the MA signal is used to extract the location of the sonic source. The experimental system is designed to measure the MA signal under electrical stimulation. RESULTS: Preliminary experiments results show that the amplitude precision is improved to less than 1 µPa. The sonic source is located with millimetre precision. CONCLUSIONS: We propose a new MA source-locating method with high measurement and location precision. This method will be significant to the study of the imaging and monitoring of the current distribution of electrical stimulation with high precision.

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“…Then, the vibrations produced by Lorentz force [3][4][5] emitted magneto-acoustic (MA) signals, which could be detected and measured outside the sample. Thus, measuring the MA signal can reveal the conductivity [6] or the tissue's current [7].…”

Section: Introductionmentioning

confidence: 99%

A study on locating the sonic source of sinusoidal magneto-acoustic signals using a vector method

Zhang

Zhou

et al. 2015

BME

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Abstract. Methods based on the magnetic-acoustic effect are of great significance in studying the electrical imaging properties of biological tissues and currents. The continuous wave method, which is commonly used, can only detect the current amplitude without the sound source position. Although the pulse mode adopted in magneto-acoustic imaging can locate the sonic source, the low measuring accuracy and low SNR has limited its application. In this study, a vector method was used to solve and analyze the magnetic-acoustic signal based on the continuous sine wave mode. This study includes theory modeling of the vector method, simulations to the line model, and experiments with wire samples to analyze magnetoacoustic (MA) signal characteristics. The results showed that the amplitude and phase of the MA signal contained the location information of the sonic source. The amplitude and phase obeyed the vector theory in the complex plane. This study sets a foundation for a new technique to locate sonic sources for biomedical imaging of tissue conductivity. It also aids in studying biological current detecting and reconstruction based on the magneto-acoustic effect.

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Electromagnetic acoustic imaging

Cited by 15 publications

References 15 publications

Electromagnetic–Acoustic Sensing for Biomedical Applications

Electromagnetic–Acoustic Sensing for Biomedical Applications

A preliminary in vivo study of a method for measuring magneto-acoustic sonic source under electrical stimulation

A study on locating the sonic source of sinusoidal magneto-acoustic signals using a vector method

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