ESTIMATION OF DEFOCUS AND ASTIGMATISM IN TRANSMISSION ELECTRON MICROSCOPY
Chapter 4: Cryo-EM Data Collection – Cryo EM 101
Improved specimen reconstruction by Hilbert phase contrast tomography
Contrast transfer function - Wikipedia
Figure 1 from Precise and unbiased estimation of astigmatism and defocus in transmission electron microscopy | Semantic Scholar
Thon Rings — speckle-tracking documentation
Dose Fractionation and Motion Correction | Gatan, Inc.
Oli B. Clarke on Twitter: "@EugenePichkur ...but fit not optimal. Same issue with Gctf - can fit either protein or solvent Thon rings independently, not both together." / Twitter
Thon ring evaluation for micrograph selection in relion · Issue #310 · 3dem/relion · GitHub