NMR imaging of internal features in wood.

SJ Chang, JR Olson, PC Wang - 1989 - cabidigitallibrary.org
SJ Chang, JR Olson, PC Wang
1989cabidigitallibrary.org
Two white oak (Quercus alba) logs and one black cherry (Prunus serotina) log were
examined with an NMR (nuclear magnetic resonance) scanner to view internal features of
the wood. As a result of inherent moisture variations associated with various characteristics
of the log, clear images were obtained to reveal not only normal features such as sapwood-
heartwood, earlywood-latewood, and wood rays, but also defects such as reaction wood,
wetwood, gum spots, and knots. Further scanning of additional species, faster scanning …
Abstract
Two white oak (Quercus alba) logs and one black cherry (Prunus serotina) log were examined with an NMR (nuclear magnetic resonance) scanner to view internal features of the wood. As a result of inherent moisture variations associated with various characteristics of the log, clear images were obtained to reveal not only normal features such as sapwood-heartwood, earlywood-latewood, and wood rays, but also defects such as reaction wood, wetwood, gum spots, and knots. Further scanning of additional species, faster scanning methods, development of algorithms for image interpretation, and a lower cost for the NMR scanner would facilitate the early adoption of this technology.
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