Jaesok Yu a Postdoctoral fellow in the Ultrasound Imaging and Therapeutics Research Laboratory at Georgia Institute of Technology. My research interests include the development of advanced molecular photoacoustic (PA) and ultrasound (US) imaging technologies; such as a phase-transition droplet as a novel dual-mode contrast agent, US super-resolution microvascular imaging to overcome the acoustic diffraction limit. Currently, I’m developing 4D volumetric US imaging system and high-frequency (>30 MHz) US imaging system with investigation of clinical applications of the developed systems.