First paper on spiral cone-beam CT (1991) to solve the long object problem. Cone-beam CT scanners perform 100-million scans annually in the world.

First paper on superiority of spiral fan-beam CT (1994) over step-and-shoot CT

First paper and patent on bioluminescence tomography (2004)

First paper and patent on interior tomography (2007)

State-of-the-art multi-scale CT facility (2009)

Axiomatic bibliometrics (2010) to credit coauthors and rank institutions

Omni-tomography (2011) for spatio-temporal fusion of tomography modalities

Spectrography (2011) for 3D reconstruction with multi-energy coherent radiation