Advancements in photoacoustic detection techniques for biomedical imaging

Photoacoustic imaging is a promising modality with potentially broad applications. To achieve high-quality images, an appropriate detection technique suitable for the specific application is crucial. This review categorizes detection technologies into two primary methods: ultrasonic transducers and optical sensing. We present their detection principles and recent progress, from conventional to advanced technologies. We finally conclude by providing a detailed classification, outlining the main characteristics of each technique.