@inproceedings{7a9704db4f104b05ae9454a194c91062,
title = "Improving the image quality of photoacoustic tomography (PAT) by using a negative acoustic lens",
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.",
keywords = "Directivity, Negative lens, Photoacoustic tomography",
author = "Changhui Li and Geng Ku and Wang, {Lihong V.}",
year = "2008",
month = feb,
day = "28",
doi = "10.1117/12.763533",
language = "English (US)",
isbn = "9780819470317",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
publisher = "SPIE",
booktitle = "Photons Plus Ultrasound",
note = "9th Conference on Photons Plus Ultrasound: Imaging and Sensing 2008 ; Conference date: 20-01-2008 Through 23-01-2008",
}