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 analysis
Sérgio Setsuo Maeda, Barbara Peters, Lígia Araújo Martini, Hannah Karen Moreira Antunes, Marı́a Cristina González, Henrique Pierotti Arantes, Carla M. Prado, Camila Lemos Pinto, Iana Mizumukai de Araújo, Francisco José Albuquerque de Paula, João Lindolfo Cunha Borges, Ben‐Hur Albergaria, Marcela Ushida, Guilherme Cardenaz de Souza, Laura Maria Carvalho de Mendonça, Mirley do Prado, Marcelo Antônio Amaro Pinheiro
Abstract
OBJECTIVE: To review the technical aspects of body composition assessment by dual-energy X-ray absorptiometry (DXA) and other methods based on the most recent scientific evidence. MATERIALS AND METHODS: This Official Position is a result of efforts by the Scientific Committee of the Brazilian Association of Bone Assessment and Metabolism (Associação Brasileira de Avaliação Óssea e Osteometabolismo, ABRASSO) and health care professionals with expertise in body composition assessment who were invited to contribute to the preparation of this document. The authors searched current databases for relevant publications. In this first part of the Official Position, the authors discuss the different methods and parameters used for body composition assessment, general principles of DXA, and aspects of the acquisition and analysis of DXA scans. CONCLUSION: Considering aspects of accuracy, precision, cost, duration, and ability to evaluate all three compartments, DXA is considered the gold-standard method for body composition assessment, particularly for the evaluation of fat mass. In order to ensure reliable, adequate, and reproducible DXA reports, great attention is required regarding quality control procedures, preparation, removal of external artifacts, imaging acquisition, and data analysis and interpretation.