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Intense acoustic bursts as a signal-enhancement mechanism in ultrasound-modulated optical tomography

Kim, Chulhong and Zemp, Roger J. and Wang, Lihong V. (2006) Intense acoustic bursts as a signal-enhancement mechanism in ultrasound-modulated optical tomography. Optics Letters, 31 (16). pp. 2423-2425. ISSN 0146-9592. doi:10.1364/OL.31.002423.

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Biophotonic imaging with ultrasound-modulated optical tomography (UOT) promises ultrasonically resolved imaging in biological tissues. A key challenge in this imaging technique is a low signal-to-noise ratio (SNR). We show significant UOT signal enhancement by using intense time-gated acoustic bursts. A CCD camera captured the speckle pattern from a laser-illuminated tissue phantom. Differences in speckle contrast were observed when ultrasonic bursts were applied, compared with when no ultrasound was applied. When CCD triggering was synchronized with burst initiation, acoustic-radiation-force-induced displacements were detected. To avoid mechanical contrast in UOT images, the CCD camera acquisition was delayed several milliseconds until transient effects of acoustic radiation force attenuated to a satisfactory level. The SNR of our system was sufficiently high to provide an image pixel per acoustic burst without signal averaging. Because of the substantially improved SNR, the use of intense acoustic bursts is a promising signal enhancement strategy for UOT.

Item Type:Article
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Wang, Lihong V.0000-0001-9783-4383
Additional Information:© 2006 Optical Society of America. Received March 21, 2006; accepted May 8, 2006; posted May 25, 2006 (Doc. ID 69198); published July 25, 2006. We thank X. Xiao, S. Sakadžić, and A. Garcia-Uribe for fruitful scientific discussions. This research was supported by National Institutes of Health grant CA094267.
Funding AgencyGrant Number
Issue or Number:16
Classification Code:OCIS codes: 030.1670, 110.6150, 110.7050, 110.7170, 170.3880
Record Number:CaltechAUTHORS:20161118-103336409
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Official Citation:Chulhong Kim, Roger J. Zemp, and Lihong V. Wang, "Intense acoustic bursts as a signal-enhancement mechanism in ultrasound-modulated optical tomography," Opt. Lett. 31, 2423-2425 (2006)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72155
Deposited By: Tony Diaz
Deposited On:18 Nov 2016 18:47
Last Modified:11 Nov 2021 04:57

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