Feasibility study of a time-resolving x-ray tomographic system

This paper discusses the possibilities for developing a tomographic scanner for studying the phase distribution of fluidized beds. The system is based on a medical x-ray source equipped with 30 CdWO4 detectors. We mimic a five-source system via simulation and in experiments of voids in a 23 fluidized bed filled with polystyrene particles. Both static voids and moving ones are studied. The reconstruction uses the simultaneous algebraic reconstruction technique with regularization. We find that it is possible to reconstruct objects with a spatial resolution of about 5 mm at a frame rate of 200 Hz. It is concluded that noise levels should be kept below 2%.