TY - JOUR
T1 - Polychromatic neutron phase-contrast imaging of weakly absorbing samples enabled by phase retrieval
AU - Østergaard, Maja
AU - Naver, Estrid Buhl
AU - Kaestner, Anders
AU - Willendrup, Peter K.
AU - Brüel, Annemarie
AU - Sørensen, Henning Osholm
AU - Thomsen, Jesper Skovhus
AU - Schmidt, Søren
AU - Poulsen, Henning Friis
AU - Kuhn, Luise Theil
AU - Birkedal, Henrik
PY - 2023
Y1 - 2023
N2 - The use of a phase-retrieval technique for propagation-based phase-contrast neutron imaging with a polychromatic beam is demonstrated. This enables imaging of samples with low absorption contrast and/or improving the signal-to-noise ratio to facilitate e.g. time-resolved measurements. A metal sample, designed to be close to a phase pure object, and a bone sample with canals partially filled with D2O were used for demonstrating the technique. These samples were imaged with a polychromatic neutron beam followed by phase retrieval. For both samples the signal-to-noise ratios were significantly improved and, in the case of the bone sample, the phase retrieval allowed for separation of bone and D2O, which is important for example for in situ flow experiments. The use of deuteration contrast avoids the use of chemical contrast enhancement and makes neutron imaging an interesting complementary method to X-ray imaging of bone.
AB - The use of a phase-retrieval technique for propagation-based phase-contrast neutron imaging with a polychromatic beam is demonstrated. This enables imaging of samples with low absorption contrast and/or improving the signal-to-noise ratio to facilitate e.g. time-resolved measurements. A metal sample, designed to be close to a phase pure object, and a bone sample with canals partially filled with D2O were used for demonstrating the technique. These samples were imaged with a polychromatic neutron beam followed by phase retrieval. For both samples the signal-to-noise ratios were significantly improved and, in the case of the bone sample, the phase retrieval allowed for separation of bone and D2O, which is important for example for in situ flow experiments. The use of deuteration contrast avoids the use of chemical contrast enhancement and makes neutron imaging an interesting complementary method to X-ray imaging of bone.
KW - Phase-contrast imaging
KW - Neutron imaging
KW - Bone
KW - Tomography
KW - Phase retrieval
KW - Polychromatic neutrons
U2 - 10.1107/S1600576723003011
DO - 10.1107/S1600576723003011
M3 - Journal article
C2 - 37284268
SN - 0021-8898
VL - 56
SP - 673
EP - 682
JO - Journal of Applied Crystallography
JF - Journal of Applied Crystallography
IS - Pt 3
ER -