X-ray imaging and computed tomography of conifer tree rings for climatological purposes

[摘要] This paper presents images of wood structure for various measurement regimes of X-ray microtomography. This is done by obtaining tomographic slices (iSee, CTvox), averaging them with the help of a statistical script called Adobe Photoshop, converting the average images into multidimensional data sets, and then averaging the image profiles (OriginCalc) to finally obtain a two-dimensional array of dendrochronological series of tree-ring density. The results of measurements are checked by a weight method to confirm the reliability of the data processing algorithm. For dendrochronological measurements of the ring density, it is shown that, depending on the width, two modes can be used: 80-μm (for wide rings) and 30-μm (for narrow rings). A measurement mode of less than 10-μm is used to display the structure of the wood inside a ring. The results of XCT-density measurements performed with an 8-μm resolution are given to assess the daily changes in wood density during the growing season.

[发布机构] Institute of Monitoring of Climatic and Ecological Systems SB RAS, 10/3, Akademicheskii Ave., Tomsk; 634055, Russia^1;School of Non-Destructive Testing and Security, National Research Tomsk Polytechnic University, ul. Savinykh, 7, Tomsk; 634050, Russia^2;Research School of High-Energy Physics, National Research Tomsk Polytechnic University, ul. Savinykh, 7, Tomsk 634050, Russia^3

[效力级别] 计算机科学

[关键词] Adobe Photoshop;Data processing algorithms;Measurement modes;Measurements of;Multi-dimensional datasets;Tomographic slices;Two-dimensional arrays;X ray microtomography