Fig. 1

A Basic principle of Photoacoustic wave generation; B year wise number of publications related to nanoparticles and photoacoustic imaging; C advances in PAI for different organs in vivo Part a of the figure was inspired from the article published by Jeong, Kim and co-workers in Biosensors journal in the year 2022 [36]. Part b of the figure was prepared using R studio with Biblioshiny package for all the analysis for downloaded data. We have imported the acquired Scopus plain text record in Bibliometrix R web interface. Part c of the PAI images were reproduced from the different articles published and are cited here [27, 37,38,39,40,41,42,43,44,45,46]