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Medical CAT-scanning: X-ray absorption coefficients, CT-numbers and their relation to wood density

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Summary

This paper describes how X-ray absorption coefficients and CT-number in medical CAT-scanning can be calculated for dry and wet wood. A comparison with earlier recorded data for dry wood showed that the deviation between calculated and measured CT-numbers was not significant. Linear regression showed that wood density could be measured with an accuracy of ±4 kg/m3. Wood having the same green density but containing different amounts of water have different absorption coefficients and CT-numbers. A linear relationship between CT-numbers and density of wood containing water was developed. Wood density could be measured with an accuracy of ±13.4 kg/m3.

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Authors and Affiliations

  1. Dept. of Wood Technology at Skellefteå, University of Luleå, Skeria 3, S-931 87, Skellefteå, Sweden

    L. O. Lindgren Lic. Tech.

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  1. L. O. Lindgren Lic. Tech.
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Lindgren, L.O. Medical CAT-scanning: X-ray absorption coefficients, CT-numbers and their relation to wood density. Wood Sci.Technol. 25, 341–349 (1991). https://doi.org/10.1007/BF00226173

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  • DOI: https://doi.org/10.1007/BF00226173

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