The Peruvian Amazon has a high level of biodiversity and is the fifth most deforested region in the world; forest plantations are one measure to curb this problem. Generally, businessmen and timber producers select harvestable trees using visual methods based on external morphological characteristics, without taking into account the internal health of the individuals. Therefore, in order to promote and contribute to forestry development, the main objective of this study is to use the acoustic tomograph to determine the internal health of a forest plantation of Tornillo in El Dorado - INIA, District of San Juan Bautista, Loreto. The plantation is 24 years old and consists of 40 individuals of Cedrelinga cateniformis (Ducke) Ducke. The biometric structure and health (internal and external) were evaluated, using equipment such as Field-Map and acoustic tomograph. The dasometric variables sh...