The TreeRadar Unit (TRU~(TM)), manufactured by Tree Radar, Inc., of Silver Spring, Maryland, is a novel application of ground-penetrating radar (GPR) that can be used to assess trees noninvasively. The TRU can be used to assess the trunks and roots oftrees 20 inches and larger. It also can, with a specific antenna, be used on tree branches and smaller trees. The primary uses we have seen for it in our practice have been for tree-risk assessment and tree management during construction. However, we also have used it in tree-condition assessment generally and in tree- and hardscape-conflict assessment, detecting roots behind a wall or under a hardscape.
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