NDLI: Phase contrast neutron imaging of mixed phase-amplitude objects

Content Provider	IEEE Xplore Digital Library
Author	Mishra, K.K. Hawari, A.I.
Copyright Year	2007
Description	Author affiliation: North Carolina State Univ., Raleigh (Mishra, K.K.; Hawari, A.I.)
Abstract	A neutron imaging facility has been set up at the North Carolina State University (NCSU) PULSTAR reactor. Currently, work has started on tailoring the design of the facility to allow the performance of phase contrast neutron radiography. This is an imaging modality that has been extensively applied in X-ray imaging and was demonstrated using neutrons over the past few years. In this case, contrast formation in the image, especially at edges, is enhanced due to phase shifts that take place as the neutron wave passes through regions in the sample that differ in the coherent scattering length density. Usually, the pure phase object approximation is used to formulate the problem, whereas realistic samples represent mixed phase-amplitude objects. In this work, a formulation for mixed phase- amplitude objects with moderate neutron attenuation coefficients and its effect on the neutron image is being presented. Using computational simulations, it is observed that the pure phase object approximation results in over enhancement of edges for a phase-amplitude object, with significant change in the case of neutron imaging depending upon the edge forming material characteristics. The total contrast for the mixed phase-amplitude object is less than the sum of the individual attenuation and phase contrast components. The difference depends on the scalar product of the gradient of the coherent scattering length density and the attenuation coefficient. The presented formulation can aid in predicting the performance characteristics of neutron phase imaging experiments.
Starting Page	1705
Ending Page	1710
File Size	240383
Page Count	6
File Format	PDF
ISBN	9781424409228
ISSN	10957863
DOI	10.1109/NSSMIC.2007.4437329
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Neutrons Attenuation Optical imaging X-ray scattering Inductors X-ray imaging Computational modeling Refractive index Light scattering Nuclear and plasma sciences Phase-Amplitude Objects. Neutron Imaging Phase Contrast
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Investigating Phase Contrast Neutron Imaging for Mixed Phase-Amplitude Objects

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