Reconstruction of internal density distributions in porous bodies from laser ultrasonic dataIt is presently shown that, for density-reconstruction problems in which information about the inhomogeneity is known a priori, the nonlinear least-squares algorithm yields satisfactory results on the basis of limited projection data. The back-projection algorithm, which obviates assumptions about the objective function to be reconstructed, does not recover the boundary of the inhomogeneity when the number of projections is limited and ray-bending is ignored.
Document ID
19930034663
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lu, Yichi (NASA Headquarters Washington, DC United States)
Goldman, Jeffrey A. (NASA Headquarters Washington, DC United States)
Wadley, Haydn N. G. (Virginia Univ. Charlottesville, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: Review of progress in quantitative nondestructive evaluation. Vol. 11A; Proceedings of the 18th Annual Review, Brunswick, ME, July 28-Aug. 2, 1991 (A93-18576 05-38)