Photoacoustics《光声学》(季刊). The aim of the open access Photoacoustics journal (PACS) is to publish original research and review contributions within the fast-growing field of photoacoustics-optoacoustics-thermoacoustics, which exploits acoustical and ultrasonic phenomena excited by electromagnetic radiation for purposes of detection, visualization, and characterization of a variety of materials and biological tissues, including living organisms.Many research directions in photoacoustics, especially biomedical optoacoustic imaging experience explosive growth in the 21st century.