Ultra-High Frequency Self-Focusing Ultrasonic Sensors With Half-Concave Geometry for Visualization of Mouse Brain Atrophy. - Jianxin Zhao; Chunlong Fei; Jingrong He; Dongming He; Yecheng Wang; Jun Chen; Zhaoxi Li; Yi Quan; Tianlong Zhao; Lifei Lou; Zhihai Qiu; Yintang Yang (IEEE Trans. Biomed. Eng., 2024)