The use of electron diffraction patterns for crystal structure determination has a long tradition. A short history of the developments is provided in "Traditional electron diffraction (ED)".

Traditionally electron diffraction uses oriented diffraction patterns 

In contrast to traditional methods Electron Diffraction Tomography (EDT), which was originally developed as automated electron diffraction tomography (ADT) in our group, uses non-oriented diffraction patterns bearing less dynamical scattering effects. Here the developed strategies for data acquisition, processing and the reconstruction a series of two-dimensinal electron diffraction patterns into a three-dimensional diffraction space as well as data extraction, validation and the final structure solution route are described.

The basis of automated electron diffraction tomography (ADT) is to acquire a series of diffraction patterns and use them for the reconstruction of the three dimensional intensity space

A high-strength silicide phase in a stainless steel alloy designed for wear-resistant applicationsNature Communications 9:1374 (2018)

After ADT was born in 2007 many different approaches for a fine sampling of intensity space have been developed. They are collected and described under the general description "Electron diffraction tomography (EDT)"