” While at Stanford University he conceived the first fan-beam, rotary Computed Tomography scanners using Xenon detector arrays which became the standard in the industry for 20 years. The fan beam CT patents were licensed to General Electric and sub-licensed worldwide. While Professor of Radiology (Physics) at the University of California, San Francisco, he developed the first scanning electron beam CT scanner (EBCT) and later founded Imatron Inc which commercialized EBCT and was the leader in cardiac CT imaging for 20 years until sold to General Electric in 2001. “
” As in conventional CT technology, the X-ray source-point moves along a circle in space around an object to be imaged. In EBT, however, the X-ray tube itself is large and stationary, and partially surrounds the imaging circle. Rather than moving the tube itself, electron-beam focal point (and hence the X-ray source point) is swept electronically along a tungsten anode in the tube, tracing a large circular arc on its inner surface. This motion can be very fast. “https://en.wikipedia.org/wiki/Electron_beam_computed_tomography