Speaker: Prof. Liangzhong (Shawn) Xiang, University of California, Irvine
Program Description:
X-ray imaging has proved invaluable in medical diagnoses and non-destructive testing (NDT) in the past century. However, there remain two major limitations: radiation harm and inaccessibility to the sample. A novel imaging modality, X-ray induced acoustic computed tomography (XACT), overcomes these limitations of conventional x-ray imaging. In XACT, x-ray induced excitation causes localized heating (<mK) and thermoelastic expansion. This induces a detectable ultrasonic emission, thereby enabling imaging. XACT has the potential to enable low-dose, fast, 3D imaging requiring only single projection. We discuss the fundamentals of XACT and summarize milestones in its evolution over the past several years since its first demonstration since year 2013. We will highlight XACT’s potential applications in biomedical imaging and NDT, and discuss the latest advanced concepts and future directions.
