An extension of quasi-one-dimensional tomography

摘要

A method for rapid Limited-angle tomography is suggested that allows the reconstruction of density distribution in hardwood samples with high accuracy and spatial resolution from only a few x-ray projections. The sparsity of the experimental x-ray data is compensated by incorporation of a priori knowledge about generic wood macrostructure, as well as some morphological information obtainable from optical images of the sample surface, in the mathematical framework of the tomographic analysis. Numerical tests of the proposed method confirm its potential as a practical technique for nondestructive testing of trees for scientific and industrial purposes. It can also be useful for the analysis of other types of object with an underlying layered structure. (C) 1998 Optical Society of America. [References: 8]