Berlin 2015 – wissenschaftliches Programm
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MI: Fachverband Mikrosonden
MI 10: Poster: Microanalysis and Microscopy
MI 10.4: Poster
Mittwoch, 18. März 2015, 15:00–17:30, Poster B
CUDA Accelerated Framework for Phase Reconstruction in X-ray Imaging Using SciPAL — •Johannes Hagemann1, Stephan Kramer2, and Tim Salditt1 — 1Institute for X-ray physics, G. A. U. Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen — 2MPI for biophysical chemistry, Am Faßberg 11, 37077 Göttingen
The work horses for phase retrieval in coherent x-ray imaging are iterative
projection algorithms (GS, HIO, RAAR).
The increasing number of pixels in current detectors (up to 4k x 4k) fosters the
need for faster implementations.
Based on our SciPAL library [1] and our work on phase holography [2,3]
we have developed a C++ framework for projection algorithms.
SciPAL offers an expression template based interface for mathematical expressions
which enables seamless transitions between different parallelization tools like CUDA or OpenMP.
By off-loading computations to the GPU it is capable of online phase retrieval.
SciPAL: Expression Templates and Composition Closure Objects for High
Performance Computational Physics with CUDA and OpenMP, S. C. Kramer and
J. Hagemann, ACM TOPC (to appear).
S. C. Kramer, J. Hagemann, D. R. Luke, Real-Time Phase Masks for Interactive
Stimulation of Optogenetic Neurons, arXiv:1302.0120
J. Hagemann et al. Opt. Express 22, 11552 (2014)