During our measurements performed with the FAKOPP 3D acoustic tomograph, we map the extent of hidden decays and cavities inside the tree that are not visible to the naked eye. In collaboration with our tree assessor colleague, György Gergely Müller, we prepare a reliable expert opinion based on the results, which includes the tree's health status and necessary treatment recommendations. The professional execution of the suggested interventions is fully carried out by our prepared team of arborists using rope-access techniques.