This version is not peer-reviewed. Panangattukara Prabhakaran Praveen Kumar *,Dong-Kwon Lim *,Taeho Kim * Panangattukara Prabhakaran Praveen Kumar *,Dong-Kwon Lim *,Taeho Kim * You are already at the latest version Photoacoustic imaging (PAI) is an emerging hybrid biomedical imaging modality that combines the high molecular contrast of optical excitation with the deep tissue penetration of ultrasound detection.