The application of liquid-solid circulating fluidized beds (LSCFB) is steadily increasing in the chemical, biochemical and other industries. Electrical Resistance Tomography as an imaging technique was employed for the study of flow parameters such as phase holdup, velocity distribution of individual phases in LSCFB. Solids hold up was lower in the central regions of the riser and higher in regions close to the wall. Phase propagation velocity was also higher at the central regions compared to the wall regions. The results agreed well with published findings. This is an abstract of a paper presented at the 2007 AIChE Annual Meeting (Salt Lake City, UT 11/4-9/2007).