Low-noise small-size microring ultrasonic detectors for high-resolution photoacoustic imaging

Sung-Liang Chen; Tao Ling; L. Jay Guo

doi:10.1117/1.3573386

Abstract

Small size polymer microring resonators have been exploited for photoacoustic (PA) imaging. To demonstrate the advantages of the wide acceptance angle of ultrasound detection of small size microrings, photoacoustic tomography (PAT), and delay-and-sum beamforming PA imaging was conducted. In PAT, we compared the imaging quality using different sizes of detectors with similar noise-equivalent pressures and the same wideband response: 500 μm hydrophone and 100, 60, and 40 μm microrings. The results show significantly improved imaging contrast and high resolution over the whole imaging region using smaller size detectors. The uniform high resolution in PAT imaging using 40 μm microrings indicates the potential to resolve microvasculature over a large imaging region. The improved lateral resolution of two-dimensional and three-dimensional delay-and-sum beamforming PA imaging using a synthetic array demonstrate another advantageous application of small microrings. The small microrings can also be applied to other ultrasound-related imaging applications.

Citation Download Citation

Sung-Liang Chen, Sung-Liang Chen, Tao Ling, Tao Ling, L. Jay Guo, L. Jay Guo, } "Low-noise small-size microring ultrasonic detectors for high-resolution photoacoustic imaging," Journal of Biomedical Optics 16(5), 056001 (1 May 2011). https://doi.org/10.1117/1.3573386 . Submission:

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