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

机译:用于高分辨率光声成像的低噪声小型微环超声波探测器

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摘要

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.
机译:小型聚合物微环谐振器已用于光声(PA)成像。为了证明小尺寸微环的超声波检测的宽接受角,光声层析成像(PAT)以及延迟和求和波束形成PA成像的优势。在PAT中,我们比较了使用不同尺寸的探测器(具有相同的等效噪声压力和相同的宽带响应)的成像质量:500μm水听器和100、60和40μm微环。结果显示使用较小尺寸的检测器可在整个成像区域内显着改善成像对比度和高分辨率。使用40μm微环的PAT成像中的均匀高分辨率表明,在大成像区域上分辨微脉管系统的潜力。使用合成阵列改进的二维和三维延迟和求和波束形成PA成像的横向分辨率展示了小型微环的另一个有利应用。小微环也可以应用于其他与超声相关的成像应用。

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