Four mathnmatlral techniques for reconstruction of the radial two-dimensional dlstrihut ion of fission pro~,.cts using projections obtained by nondestructive ganvna scanning were xwaluaterl. Perotlstruction of a picture from a finite set of wojectinns is mathematically indetermi~ate; therefore, recor"truction techniques are heuristic, Particulart.v wh@n nnl,y a small number of projections are available, Of the techniques evaluat~d, the filtered hackprojectinn algorithm provided the best recons!ruc?.ion frw siml~tel qam~-ray sourcet, IIS well as for actual irradiated fuel material.
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