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Efficient forward projection through discrete data sets using tri-linear interpolation

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3 Author(s)
Kohler, Th. ; Philips Res. Lab., Hamburg, Germany ; Turbell, H. ; Grass, M.

Forward projection through discrete data sets is a major step in all iterative reconstruction methods. Based on the assumption that the true object function can be described adequately by tri-linear interpolation between the samples, which are located on a cubic grid, the authors propose an efficient and accurate method to calculate line integrals: the line is divided into segments separated by the surfaces of the grid and within each segment the integration is done using Simpson's rule

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Nuclear Science Symposium Conference Record, 2000 IEEE  (Volume:2 )

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