Ultrasounds are a critical part of modern health care, helping to image soft tissue and organs, measure blood flow, and monitor fetal development. But the technique has constraints, including a limited field of view and the potential for operator error. To address current shortfalls and push the technology toward new applications, Lihong Wang , Bren Professor of Medical Engineering and Electrical Engineering, and a team of Caltech researchers have developed a system that can perform ultrasound