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The technique of computed tomography (CT) is used to reconstruct velocity profile of air flow from its average velocities from ultrasonic velocimeter measuring over a specific set of paths. Although the scanning method for collecting data can be considered as a special case of diverged beam scan, this set of data can be rearranged into the form of interlaced parallel scan. A knowledge of zero velocity at circumference of the pipe is also introduced and the data are interpolated in each view to obtain uniformly spaced data. This is then applied in the convolution algorithm for parallel scan data. This method is tested with the data from the experiment and the result is reported.

An Ultrasonic Tomography for Reconstructing the Velocity Profile of Air Flow from Nonuniformly Spaced Projection Data