AUTHOR=Tian Chao , Xia Jun , Wang Xueding TITLE=Editorial: Optics and Ultrasound in Biomedicine: Sensing, Imaging, and Therapy JOURNAL=Frontiers in Physics VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.712405 DOI=10.3389/fphy.2021.712405 ISSN=2296-424X