Send to

Choose Destination
J Electron Microsc (Tokyo). 2010;59(4):299-310. doi: 10.1093/jmicro/dfq009. Epub 2010 Mar 30.

Automated specimen search in cryo-TEM observation with DIFF-defocus imaging.

Author information

JEOL Ltd., 1-2 Musashino 3-Chome, Akishima, Tokyo, Japan.


We have developed an automated specimen search algorithm for cryo-electron microscopy imaging of ice-embedded single particles suspended across regularly spaced holes. To maximize the particle visibility under a low electron exposure rate condition, specimen searching is carried out in diffraction mode. However, images in diffraction mode contain significant pincushion distortion, making it difficult to computationally predict the locations of the regularly spaced holes. We have implemented a distortion-correction mechanism to restore the primitive distortion-free image and a correlation-based algorithm to accurately determine the periodicity of the holes. A stage-shift method to optimize positional reproducibility is also implemented. Addition of our algorithms to the JADAS software for automated transmission electron microscopy data acquisition has significantly improved the accuracy of specimen search.

[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Silverchair Information Systems Icon for PubMed Central
Loading ...
Support Center