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Figure 5
Part of a parabolic reconstruction from a focal series of micrographs of PtIr. (a) Amplitude image of a tile extracted from the larger reconstruction. (b) Phase image corresponding to (a) with a distribution peaked at ∼1.95 radians (112°). The inset shows the phase distribution. Scale bar: 20 Å. (c) 3D power spectrum of the focal series. (d) 3D power spectrum after applying the full CTF [equation (1)[link]], producing a combination of the results in (e) and (f). (e) 3D power spectrum of the focal series after applying the first half of the CTF [equation (2)[link]] as for the parabolic reconstruction, flattening one curve and doubling the curvature of the other. The flat plane corresponds to the real-space 2D images in (a) and (b). (f) 3D power spectrum of the focal series after applying the conjugate (second half) of the CTF [equation (2)[link]].

IUCrJ
Volume 13| Part 1| January 2026| Pages 77-93
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525010796