Photoacoustic imaging is a hybrid biomedical imaging technique, combining rich optical contrasts and good acoustic resolution in deep tissues. As a noninvasive and nonionized imaging method, photoacoustic imaging has shown great potentials in biomedicine in the past decade. In this review, we give a brief introduction of the physical principle and three major implementations of photoacoustic imaging. Then, we present pictures of some recent progress about the extraction of new imaging parameters from photoacoustic radio-frequency signals. These parameters are highly associated with the tissue microstructure characteristics, including characteristic size, number density, and elasticity. This information could give us insight into various properties of tissue in-depth and be applied to tissue classification for basic research and clinical settings.

中文翻译：

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从光声射频信号中提取的多种信息及其在组织分类中的应用。

光声成像是一种混合的生物医学成像技术，在深部组织中结合了丰富的光学对比度和良好的声音分辨率。作为一种非侵入性和非电离成像方法，光声成像在过去十年中已显示出在生物医学中的巨大潜力。在这篇综述中，我们简要介绍了光声成像的物理原理和三种主要实现方式。然后，我们展示一些有关从光声射频信号中提取新成像参数的最新进展的图片。这些参数与组织的微结构特征高度相关，包括特征尺寸，数量密度和弹性。这些信息可以使我们深入了解组织的各种特性，并将其应用于组织分类以进行基础研究和临床设置。