Fig. 5From: Official position of the Brazilian Association of Bone Assessment and Metabolism (ABRASSO) on the evaluation of body composition by densitometry: part I (technical aspects)—general concepts, indications, acquisition, and analysisFundamental principles of dual-energy X-ray absorptiometry (DXA): the X-ray source located at the base of the equipment emits high and low energy X-ray beams that are captured by the detectors for assessment of interaction and differences between the three compartments evaluated by DXABack to article page