TY - JOUR
T1 - Tomographic reconstruction using tilted Laue analyser-based X-ray phase-contrast imaging
AU - Chalmers, M. C.
AU - Kitchen, M. J.
AU - Uesugi, K.
AU - Falzon, G.
AU - Quin, P.
AU - Pavlov, K. M.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - Analyser-based phase-contrast imaging (ABPCI) is a highly sensitive phase-contrast imaging method that produces high-contrast images of weakly absorbing materials. However, it is only sensitive to phase gradient components lying in the diffraction plane of the analyser crystal [i.e. in one dimension (1-D)]. In order to accurately account for and measure phase effects produced by the wavefield-sample interaction, ABPCI and other 1-D phase-sensitive methods must achieve 2-D phase gradient sensitivity. An inclined geometry method was applied to a Laue geometry setup for X-ray ABPCI through rotation of the detector and object about the optical axis. This allowed this traditionally 1-D phase-sensitive phase-contrast method to possess 2-D phase gradient sensitivity. Tomographic datasets were acquired over 360° of a multi-material phantom with the detector and sample tilted by 8°. The real and imaginary parts of the refractive index were reconstructed for the phantom.
AB - Analyser-based phase-contrast imaging (ABPCI) is a highly sensitive phase-contrast imaging method that produces high-contrast images of weakly absorbing materials. However, it is only sensitive to phase gradient components lying in the diffraction plane of the analyser crystal [i.e. in one dimension (1-D)]. In order to accurately account for and measure phase effects produced by the wavefield-sample interaction, ABPCI and other 1-D phase-sensitive methods must achieve 2-D phase gradient sensitivity. An inclined geometry method was applied to a Laue geometry setup for X-ray ABPCI through rotation of the detector and object about the optical axis. This allowed this traditionally 1-D phase-sensitive phase-contrast method to possess 2-D phase gradient sensitivity. Tomographic datasets were acquired over 360° of a multi-material phantom with the detector and sample tilted by 8°. The real and imaginary parts of the refractive index were reconstructed for the phantom.
KW - analyser-based imaging
KW - phase retrieval
KW - phase-contrast imaging
KW - phase-contrast tomography
UR - http://www.scopus.com/inward/record.url?scp=85099428102&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/ARC/FT160100454
U2 - 10.1107/S1600577520013995
DO - 10.1107/S1600577520013995
M3 - Article
C2 - 33399579
AN - SCOPUS:85099428102
VL - 28
SP - 283
EP - 291
JO - Journal of synchrotron radiation
JF - Journal of synchrotron radiation
SN - 0909-0495
IS - Part 1
ER -