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tomographic and analog 3-d simulations using noraThe results of two computer simulations demonstrate the feasibility of using the nonoverlapping redundant array (NORA) to form three-dimensional images of objects with X-rays. Pinholes admit the X-rays to nonoverlapping points on a detector. The object is reconstructed in the analog mode by optical correlation and in the digital mode by tomographic computations. Trials were run with a stick-figure pyramid and extended objects with out-of-focus backgrounds. Substitution of spherical optical lenses for the pinholes increased the light transmission sufficiently that objects could be easily viewed in a dark room. Out-of-focus aberrations in tomographic reconstruction could be eliminated using Chang's (1976) algorithm.
Document ID
19840057941
Document Type
Reprint (Version printed in journal)
Authors
Yin, L. I.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Trombka, J. I.
(NASA Goddard Space Flight Center Laboratory for Astronomy and Solar Physics, Greenbelt, MD, United States)
Bielefeld, M. J.
(Computer Sciences Corp. Baltimore, MD, United States)
Seltzer, S. M.
(National Bureau of Standards, Center for Radiation Research, Washington DC, United States)
Date Acquired
August 12, 2013
Publication Date
July 15, 1984
Publication Information
Publication: Applied Optics
Volume: 23
ISSN: 0003-6935
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Distribution Limits
Public
Copyright
Other