SIGNIFICANCE Photoacoustic (PA) tomography has demonstrated versatile biomedical applications. However, an array-based PA computed tomography (PACT) system is complex and expensive, whereas a single-element detector-based scanning PA system is too slow to detect some fast biological dynamics in vivo. New PA imaging methods are sought after. AIM To overcome these limitations, we developed photoacoustic topography through an ergodic relay (PATER), a novel high-speed imaging system with a single-element detector. APPROACH PATER images widefield PA signals encoded by the acoustic ergodic relay with a single-laser shot. RESULTS We applied PATER in vivo to monitor changes in oxygen saturation in a mouse brain and also to demonstrate high-speed matching of vascular patterns for biometric authentication. CONCLUSIONS PATER has achieved a high-speed temporal resolution over a large field of view. Our results suggest that PATER is a promising and economical alternative to PACT for fast imaging.

中文翻译：

---

通过遍历继电器的光声地形用于功能成像和体内生物识别应用。

意义 光声 (PA) 断层扫描已证明具有多种生物医学应用。然而，基于阵列的 PA 计算机断层扫描 (PACT) 系统既复杂又昂贵，而基于单元素探测器的扫描 PA 系统太慢而无法检测一些体内快速的生物动力学。新的 PA 成像方法受到追捧。目的为了克服这些限制，我们通过遍历继电器 (PATER) 开发了光声地形学，这是一种具有单元素探测器的新型高速成像系统。APPROACH PATER 对由单激光发射的声遍历继电器编码的宽场 PA 信号进行成像。结果我们在体内应用 PATER 来监测小鼠大脑中氧饱和度的变化，并展示血管模式的高速匹配以进行生物特征认证。结论 PATER 在大视野范围内实现了高速时间分辨率。我们的结果表明，PATER 是 PACT 快速成像的有前途且经济的替代品。