摘要：Photoacoustic imaging, also called optoacoustic tomography, is a non-destructive biomedical imaging technique which employs acoustic detection to image optical absorption contrast with high-resolution deep into scattering tissue. Photoacoustic imaging overcomes the limit of high light scattering in the tissue and realized in vivo high-resolution and high-contrast imaging in the deep tissue. Photoacoustic imaging technology has been rapid development in recent years and make constantly breakthrough from a technical level to the application level. This paper describes the basic principles of photoacoustic imaging technology and make an example analysis by multispectral optoacoustic tomography （MSOT）.