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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: Imaging Med. 2010 Oct 1;2(5):529–545. doi: 10.2217/iim.10.49

Figure 5. Comparison of filtered backprojection reconstruction of identical patient data with different noise control levels.

Figure 5

No smoothing (A), a 4 mm Hanning filer (B) and a 8 mm Hanning filter (C). A broader Hanning filter in spatial domain (or equivalently a lower cutoff frequency in Fourier domain) leads to smoother images.