Compressive phase contrast tomography

F. Maia; A. MacDowell; S. Marchesini; H. A. Padmore; D. Y Parkinson; J. Pien; A. Schirotzek; C. Yang

doi:10.1117/12.861946

2 September 2010 Compressive phase contrast tomography

F. Maia, A. MacDowell, S. Marchesini, H. A. Padmore, D. Y Parkinson, J. Pien, A. Schirotzek, C. Yang

Proceedings Volume 7800, Image Reconstruction from Incomplete Data VI; 78000F (2010) https://doi.org/10.1117/12.861946
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

When x-rays penetrate soft matter, their phase changes more rapidly than their amplitude. Interference effects visible with high brightness sources creates higher contrast, edge enhanced images. When the object is piecewise smooth (made of big blocks of a few components), such higher contrast datasets have a sparse solution. We apply basis pursuit solvers to improve SNR, remove ring artifacts, reduce the number of views and radiation dose from phase contrast datasets collected at the Hard X-Ray Micro Tomography Beamline at the Advanced Light Source. We report a GPU code for the most computationally intensive task, the gridding and inverse gridding algorithm (non uniform sampled Fourier transform).

Citation Download Citation

F. Maia, A. MacDowell, S. Marchesini, H. A. Padmore, D. Y Parkinson, J. Pien, A. Schirotzek, and C. Yang "Compressive phase contrast tomography", Proc. SPIE 7800, Image Reconstruction from Incomplete Data VI, 78000F (2 September 2010); https://doi.org/10.1117/12.861946

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