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- W2055762272 abstract "We present a faster iterative reconstruction algorithm based on the ordered-subset convex (OSC) algorithm for transmission CT. The OSC algorithm was modified such that it calculates the normalization term before the iterative process in order to save computational cost. The modified version requires only one backprojection per iteration as compared to two required for the original OSC. We applied the modified OSC (MOSC) algorithm to a rotation-free micro-CT system that we proposed previously, observed its performance, and compared with the OSC algorithm for 3D cone-beam reconstruction. Measurements on the reconstructed images as well as the point spread functions show that MOSC is quite similar to OSC; in noise-resolution trade-off, MOSC is comparable with OSC in a regular-noise situation and it is slightly worse than OSC in an extremely high-noise situation. The timing record shows that MOSC saves 25-30% CPU time, depending on the number of iterations used. We conclude that the MOSC algorithm is more efficient than OSC and provides comparable images." @default.
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- W2055762272 date "2009-01-23" @default.
- W2055762272 modified "2023-10-02" @default.
- W2055762272 title "A faster ordered-subset convex algorithm for iterative reconstruction in a rotation-free micro-CT system" @default.
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- W2055762272 doi "https://doi.org/10.1088/0031-9155/54/4/016" @default.
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