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- W4306175521 abstract "Propagation-based neutron phase-contrast tomography was demonstrated using the ISIS pulsed spallation source. The proof-of-concept tomogram with Paganin-type phase-retrieval filter applied exhibited an effective net boost of $23pm 1$ in the signal-to-noise ratio as compared to an attenuation-based tomogram, implying a boost in the effective degree of neutron brilliance of over two orders of magnitude. This comparison is for phase retrieval versus conventional absorption with no additional collimation in place. Expressions are provided for the optimal phase-contrast geometry as well as conditions for the validity of the method. The underpinning theory is derived under the assumption of the sample being composed of a single material. The effective boost in brilliance may be employed to give reduced acquisition time, or may instead be used to keep exposure times fixed while improving the measured contrast." @default.
- W4306175521 created "2022-10-14" @default.
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- W4306175521 date "2019-09-22" @default.
- W4306175521 modified "2023-09-30" @default.
- W4306175521 title "Revisiting neutron propagation-based phase contrast imaging and tomography: use of phase retrieval to amplify the effective degree of brilliance" @default.
- W4306175521 doi "https://doi.org/10.48550/arxiv.1909.11186" @default.
- W4306175521 hasPublicationYear "2019" @default.
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