Multi-bandwidth image reconstruction in photoacoustic tomography

Cheng-Ying Chou; Mark A. Anastasio; Jin Zhang; Geng Ku; Xinmai Yang; Lihong V. Wang

doi:10.1117/12.764127

28 February 2008 Multi-bandwidth image reconstruction in photoacoustic tomography

Cheng-Ying Chou, Mark A. Anastasio, Jin Zhang, Geng Ku, Xinmai Yang, Lihong V. Wang

Proceedings Volume 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 68561G (2008) https://doi.org/10.1117/12.764127
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

Photoacoustic tomography (PAT), also referred to optoacoustic tomography, is a hybrid imaging technique that combines an optical contrast mechanism and ultrasonic detection principles. The laser-induced photoacoustic signals in PAT are broadband in nature, but only a bandpass approximation of the signal is recorded by use of a conventional ultrasonic transducers due to its limited bandwidth. To circumvent this, a PAT system has been developed that records photoacoustic signals by use of multiple ultrasonic transducers that possess different central frequencies. In this work, we investigate a sensor fusion methodology for combining the multiple measurements to obtain an estimate of the true photoacoustic signal that is superior to that obtainable by use of any single transducer measurement. From the estimated photoacoustic signals, three-dimensional images of the optical absorption distribution are reconstructed and are found to possess improved accuracy and statistical properties as compared to the single transducer case. Preliminary computer-simulation studies are presented to demonstrate and investigate the proposed method.

Citation Download Citation

Cheng-Ying Chou, Mark A. Anastasio, Jin Zhang, Geng Ku, Xinmai Yang, and Lihong V. Wang "Multi-bandwidth image reconstruction in photoacoustic tomography", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 68561G (28 February 2008); https://doi.org/10.1117/12.764127

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KEYWORDS

Transducers

Photoacoustic spectroscopy

Acquisition tracking and pointing

Signal to noise ratio

Ultrasonics

Photoacoustic tomography

Absorption

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