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Figure 2
Illustrative example of the effect of the ramp filter on a single projection in the case of standard and interior tomography. Notation: Ft ([{\cal F}^{\,{-1}}_{{\omega}}]) is the (inverse) Fourier transform along the variable t(ω); [|\omega|] is the ramp filter; [P_{{\theta}}(t)] is the projection in parallel beam geometry acquired at angle θ.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 24| Part 1| January 2017| Pages 205-219
https://doi.org/10.1107/S1600577516015794
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