Tomographic reconstruction using tilted Laue analyser-based X-ray phase-contrast imaging

Chalmers, M.C.; Kitchen, M.J.; Uesugi, K.; Falzon, G.; Quin, P.; Pavlov, K.M.

doi:10.1107/S1600577520013995

Journal of Synchrotron Radiation Journal of
Synchrotron Radiation

IUCr IT WDC

home archive editors for authors for readers submit open access

view article

Figure 6
Maps generated throughout the experimental procedure beginning with the (a) raw tomographic data, projection number 362, showing the diffracted (left) and transmitted (right) intensities in this single projection that needs to be separated and aligned. We then perform phase retrieval to obtain maps (b) $[\Delta\tilde{\theta{{}^{{\,\prime}}}}]$ of the change of the angle of incidence upon the analyser crystal and (c) $[\Delta\hat{\theta}{{}^{\,{\prime}}}]$ , the 180° equivalent of $[\Delta\tilde{\theta{{}^{{\,\prime}}}}]$ in microradians. From this we split $[\Delta\tilde{\theta{{}^{{\,\prime}}}}]$ and $[\Delta\hat{\theta}{{}^{\,{\prime}}}]$ into the (d) vertical and (e) horizontal components of the phase gradients, divided by the wavenumber, in microradians. From the transmitted projection we obtain a map of (f) intensity, while performing 2-D integration using (d) and (e) to calculate the (g) phase map in radians. We then performed tomographic reconstruction using the intensity and phase maps to calculate the (h) β maps (×10^-9), and (i) δ maps (×10^-6), respectively.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 28| Part 1| January 2021| Pages 283-291

https://doi.org/10.1107/S1600577520013995

Follow J. Synchrotron Rad.

Search IUCr Journals		doi		Advanced search
Author		volume	page