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Acousto-electric tomography

Zhang, Hao and Wang, Lihong V. (2004) Acousto-electric tomography. In: Photons Plus Ultrasound: Imaging and Sensing. Proceedings of SPIE. No.5320. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 145-149. ISBN 9780819452283. http://resolver.caltech.edu/CaltechAUTHORS:20180927-114227162

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Abstract

Although the electric impedance of biological tissues is highly sensitive to their physiological and pathological status, pure electrical impedance tomography (EIT) has very poor spatial resolution. We invented acousto-electric tomography (AET) to image the electric impedance properties of biological tissues with high spatial resolution. AET is based on acousto-electric modulation, which is the localized variation in conductivity produced by a focused ultrasonic wave. It combines the contrast advantage of EIT and the resolution advantage of ultrasound imaging. The spatial resolution of AET is primarily defined by the size of the ultrasonic focal spot. Therefore, the resolution is much better than that of EIT, and it is scalable with the acoustic parameters. The contrast of AET is determined by the combination of three factors: the electric impedance, the media dependent modulation coefficient, and the acoustic properties. Unlike EIT, AET forms images directly without resorting to inverse algorithms. And unlike traditional ultrasonography, AET is free of speckles.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.532610DOIArticle
ORCID:
AuthorORCID
Wang, Lihong V.0000-0001-9783-4383
Additional Information:© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE).
Subject Keywords:Acousto-electric modulation, ultrasound, electric impedance, tomography
Record Number:CaltechAUTHORS:20180927-114227162
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180927-114227162
Official Citation:Hao Zhang, Hao Zhang, Lihong V. Wang, Lihong V. Wang, } "Acousto-electric tomography", Proc. SPIE 5320, Photons Plus Ultrasound: Imaging and Sensing, (12 July 2004); doi: 10.1117/12.532610; https://doi.org/10.1117/12.532610
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90033
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:28 Sep 2018 15:01
Last Modified:28 Sep 2018 15:01

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