Agradecimentos: The authors thank the CNPq for the scholarship (Proc. 141067-2018-7) and funding of the research (Proc. 426130/2018-9), the Coordination for the Improvement of Higher Education (CAPES) for the scholarship and internship in Spain (Process—88887.467257/2019-00), and the Foundation for Research Support of the State of São Paulo (Fundação de Amparo a Pesquisa do Estado de São Paulo—FAPESP) for funding research from LabEND, with which it was possible to purchase all the equipment used in the research. We also thank Carlos Eduardo Bento (student of the Service of Student Support (SAE) of the Graduate Pro-Rectory (PRG) of UNICAMP) for the support in the laboratory tests and José Victor Gonçalves Cardoso (CNPq scholarship in the project Proc. 426130/2018-9) for support related to the analysis of the measurement routes. This research was funded by CNPq (National Council for Scientific and Technological Development)—Proc. 141067-2018-7 (scholarship) and Proc. 426130/2018-9 (research) and CAPES (Coordination for the Improvement of Higher Education)—Finance Code 001 and Proc. 88887.467257/2019-00 (scholarship and internship in Spain) Ver menos

Abstract: Tomographic images generated by wave propagation are important in tree inspections and can be performed in an economically more accessible way using conventional equipment and postprocessed images, but improvements are necessary to increase image quality, giving greater reliability to the results. The objective of this paper was to present a methodological proposal for the definition of parameters related to image quality produced with tomography using ultrasound equipment and postprocessed images. As a case study, the methodology was applied to five trees of the species Cenostigma pluviosum DC. Gagnon & GP Lewis (Sibipiruna). A total of 1512 tomographic images were constructed from five trees to evaluate the cutting velocity, the interpolation algorithms and the filter application. The photographs of the discs were used to evaluate the theoretical wave propagation routes in the measurement grid and to compare the tomographic images using confusion matrix metrics. The application of the methodology proposed in this species allowed us to conclude that the most appropriate velocity range for cavities inference was up to 40% Vmax and for cavities supplemented with biodeterioration up to 45% Vmax; the best interpolator was the Ellipses method with compensation, with the use of a filter; and the accuracy was the most appropriate metric for evaluating image quality Ver menos