Real-time 3D particle tracking using ultrafast electron beam X-ray computed tomography

Ultrafast electron beam X-ray computed tomography (UFXCT) is a fast tomographic imaging technique used, e.g., for investigations of highly dynamic multiphase flows. In the last years, UFXCT was enhanced with the capability of real-time image acquisition and reconstruction. Using those capabilities, a new feedback-loop to a positioning unit was realized which allows for real-time repositioning of the scanner based on the images contents. By traversing the scanner, and hence its imaging planes, vertically, an object moving up- and/or downwards in the imaging region can be tracked and visualized. Using a phantom object moving with predetermined trajectories, the tracking latency, trackable object velocities and positioning accuracy was evaluated. Further, a latency compensation approach was developed that enhances the tracking performance.