view article

Figure 2
Differences in reconstruction due to differences in backprojector and filter implementations. (a) A 33 × 33 phantom with one bright pixel. (b) Sinogram of the phantom (computed using a strip kernel from the ASTRA toolbox). (c) Differences in (unfiltered) backprojection when using different backprojectors: (left to right) backprojection using a CPU line kernel from the ASTRA toolbox, backprojection using a GPU pixel-driven kernel from the ASTRA toolbox, absolute difference between the two backprojections. (d) Differences in reconstruction when using different filtering routines in FBP with the gpu-pixel kernel as backprojector: (left to right) reconstruction using filtering in real space with the Ram–Lak filter, reconstruction using the ramp filter in Fourier space, absolute difference between the two reconstructions.

Journal logoJOURNAL OF
ISSN: 1600-5775
Follow J. Synchrotron Rad.
Sign up for e-alerts
Follow J. Synchrotron Rad. on Twitter
Follow us on facebook
Sign up for RSS feeds