TY  - JOUR
AU  - Beyerlein, Kenneth R.
AU  - White, Thomas A.
AU  - Yefanov, Oleksandr
AU  - Gati, Cornelius
AU  - Kazantsev, Ivan G.
AU  - Nielsen, Nicolai Fog-Gade
AU  - Larsen, Peter M.
AU  - Chapman, Henry N.
AU  - Schmidt, Søren
TI  - FELIX: an algorithm for indexing multiple crystallites in X-ray free-electron laser snapshot diffraction images
JO  - Journal of applied crystallography
VL  - 50
IS  - 4
SN  - 1600-5767
CY  - Copenhagen
PB  - IUCr
M1  - PUBDB-2017-07304
SP  - 1075-1083
PY  - 2017
AB  - A novel algorithm for indexing multiple crystals in snapshot X-ray diffraction images, especially suited for serial crystallography data, is presented. The algorithm, FELIX, utilizes a generalized parametrization of the Rodrigues–Frank space, in which all crystal systems can be represented without singularities. The new algorithm is shown to be capable of indexing more than ten crystals per image in simulations of cubic, tetragonal and monoclinic crystal diffraction patterns. It is also used to index an experimental serial crystallography dataset from lysozyme microcrystals. The increased number of indexed crystals is shown to result in a better signal-to-noise ratio, and fewer images are needed to achieve the same data quality as when indexing one crystal per image. The relative orientations between the multiple crystals indexed in an image show a slight tendency of the lysozme microcrystals to adhere on (―110) facets. 
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000407040700012
C6  - pmid:28808433
DO  - DOI:10.1107/S1600576717007506
UR  - https://bib-pubdb1.desy.de/record/330858
ER  -