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In this manuscript we present a fast GPU implementation for tomographicreconstruction of large datasets using data obtained at the Braziliansynchrotron light source. The algorithm is distributed in a cluster with 4 GPUsthrough a fast pipeline implemented in C programming language. Our algorithm istheoretically based on a recently discovered low complexity formula, computingthe total volume within O(N3logN) floating point operations; much less thantraditional algorithms that operates with O(N4) flops over an input data ofsize O(N3). The results obtained with real data indicate that a reconstructioncan be achieved within 1 second provided the data is transferred completely tothe memory.

Low-complexity Distributed Tomographic Backprojection for large datasets