Traditional Chinese medicine (TCM) has a long history of treating human diseases with proven efficacy. However, due to the inherent complexity of TCM, significant challenges remain in scientifically elucidating its chemical composition, processing mechanisms, pharmacological and toxicological effects, and related mechanisms. Currently, commonly used qualitative and quantitative analytical instruments, such as ultra-high-performance liquid chromatography-mass spectrometry (UHPLC-MS), have made substantial contributions to the scientific interpretation of the complex chemical components and pharmacological mechanisms of TCM. Nevertheless, these methods often fail to provide information on the spatial distribution and localization of target chemical components. Mass spectrometry imaging (MSI) is an emerging molecular visualization technique. It not only possesses the qualitative identification capabilities of mass spectrometry but also enables the intuitive visualization of the spatial distribution of various chemical components within a sample, allowing simultaneous qualitative, quantitative, and spatial analyses. Currently, MSI has achieved a series of research outcomes in the field of TCM research. Firstiy, several commonly used MSI techniques are introduced. It then focuses on reviewing the research progress of MSI in the field of TCM analysis in recent years. Furthermore, it summarizes the technical bottlenecks encountered in MSI applications and corresponding solutions. Finally, it discusses the future development trends of this technology in TCM research, aiming to provide reference for enhancing the application of MSI in field of TCM analysis.

traditional Chinese medicine analysis  /  mass spectrometry imaging  /  MALDI-MSI  /  DESI-MSI  /  visualization