Computerized axial tomography. A non-destructive method for three-dimensional wood density/moisture content measurement
L O Lindgren
Computerized Axial Tomography (CAT-scanning) - used for medical investigations of the brain - has been evaluated as a nondestructive method of three-dimensional wood density/moisture content measurements. Density can be measured with an accuracy of ±3 kg/m³, and the accuracy in average moisture content is ±1% below and above fibre saturation point. It is theoretically possible that measurements can be made in a randomly chosen volume element of 2 x 2 x 10 mm³ within a wooden testpiece. CAT-scanning has also possibilities for evaluating: - the development of fungal attack on wood; - the development of attack by marine borers on wood; - the distribution end penetration rate of preservatives in wood; - wood drying after impregnation.