A novel and fast method of detecting foreign body in biological tissue using microwave-induced thermoacoustic tomography

Liming Nie; Da Xing; Diwu Yang; Lvming Zeng

doi:10.1117/12.741437

1 May 2007 A novel and fast method of detecting foreign body in biological tissue using microwave-induced thermoacoustic tomography

Liming Nie, Da Xing, Diwu Yang, Lvming Zeng

Author Affiliations +

Proceedings Volume 6534, Fifth International Conference on Photonics and Imaging in Biology and Medicine; 65342V (2007) https://doi.org/10.1117/12.741437
Event: Fifth International Conference on Photonics and Imaging in Biology and Medicine, 2006, Wuhan, China

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.

Citation Download Citation

Liming Nie, Da Xing, Diwu Yang, and Lvming Zeng "A novel and fast method of detecting foreign body in biological tissue using microwave-induced thermoacoustic tomography", Proc. SPIE 6534, Fifth International Conference on Photonics and Imaging in Biology and Medicine, 65342V (1 May 2007); https://doi.org/10.1117/12.741437

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