Seeing Stiffness of Tissue with Light
How can you determine how stiff a piece of material, say, biological tissue, is? You may want to poke it, then check how much its shape is altered; or you may even want to cut off a small piece, then torture it by stretching, squeezing, or pressing, and then measure how much you can deform it.
Imaging by Listening to the Sound of Light – Photoacoustic Imaging, a Fast-Developing Imaging Technique for Biomedicine
Dr. Lihong V. Wang from Washington University in St. Louis recently published an article titled Photoacoustic tomography on the renowned online encyclopedia Scholarpedia. In this article, he thoroughly reviewed the principle…