Li, Changhui and Ku, Geng and Wang, Lihong V. (2008) Improving the image quality of photoacoustic tomography (PAT) by using a negative acoustic lens. In: Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics. Proceedings of SPIE. No.6856. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 685623. ISBN 9780819470317. https://resolver.caltech.edu/CaltechAUTHORS:20180921-100904170
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Abstract
Although a small point ultrasound transducer has a wide acceptance angle, its signal-to-noise (SNR) is low due to the high thermal-noise-induced electric voltages in the transducer, which is a result of its small active area. By contrast, a finite size flat transducer has high sensitivity (good SNR), but the acceptance angle is generally small, which limits its application in reconstruction-based photoacoustic tomography (PAT). In this paper, we report a negative lens concept to increase the acceptance angle for a flat transducer. We also provide phantom experiments that demonstrate this concept can greatly increase the detection region for PAT and without losing sensitivity.
| Item Type: | Book Section | ||||||
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| Additional Information: | © 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). This project was sponsored in part by National Institutes of Health Grant Nos. R01 NS46214 and R01 EB000712. | ||||||
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| Subject Keywords: | photoacoustic tomography, negative lens, directivity | ||||||
| Series Name: | Proceedings of SPIE | ||||||
| Issue or Number: | 6856 | ||||||
| DOI: | 10.1117/12.763533 | ||||||
| Record Number: | CaltechAUTHORS:20180921-100904170 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20180921-100904170 | ||||||
| Official Citation: | Changhui Li, Changhui Li, Geng Ku, Geng Ku, Lihong V. Wang, Lihong V. Wang, } "Improving the image quality of photoacoustic tomography (PAT) by using a negative acoustic lens", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 685623 (28 February 2008); doi: 10.1117/12.763533; https://doi.org/10.1117/12.763533 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 89852 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | George Porter | ||||||
| Deposited On: | 21 Sep 2018 23:19 | ||||||
| Last Modified: | 16 Nov 2021 00:38 |
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