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Proceedings Paper

A novel and fast method of detecting foreign body in biological tissue using microwave-induced thermoacoustic tomography
Author(s): Liming Nie; Da Xing; Diwu Yang; Lvming Zeng
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Paper Abstract

The customary methods for localizing the foreign body in human body present several disadvantages, radioscopy has significant radiation exposure, MRI can not work with the metal, and also they are expensive and neither is portable. Microwave-induced thermoacoustic imaging which shares similar mechanism with photoacoustic imaging can achieve high ultrasound resolution and good microwave absorption contrast. Besides, microwave can reach deeply hidden sample in biological tissue because of its long wavelength, hence, this new imaging modality can be potentially applied to detect the foreign body hidden in human body. Our detecting methods were validated by imaging simulated foreign body embedded in biological tissue at different depths, the unknown samples embedded deeply were discernible and the signal to noise ratio was good. By employing the multi-element linear transducer array and phase-controlled focus algorithm, a circular scan of thermoacoustic signals at 20 angles needs no more than 2 minutes. Our established thermoacoustic imaging system has potential to supply a novel and fast method for surgical localization of an unknown foreign body.

Paper Details

Date Published: 1 May 2007
PDF: 8 pages
Proc. SPIE 6534, Fifth International Conference on Photonics and Imaging in Biology and Medicine, 65342V (1 May 2007); doi: 10.1117/12.741437
Show Author Affiliations
Liming Nie, South China Normal Univ. (China)
Da Xing, South China Normal Univ. (China)
Diwu Yang, South China Normal Univ. (China)
Lvming Zeng, South China Normal Univ. (China)

Published in SPIE Proceedings Vol. 6534:
Fifth International Conference on Photonics and Imaging in Biology and Medicine
Qingming Luo; Lihong V. Wang; Valery V. Tuchin; Min Gu, Editor(s)

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