Sergio Setsuo Maeda1, Barbara Santarosa Emo Peters2, Lígia Araújo Martini2, Hannah Karen Moreira Antunes3, Maria Cristina Gonzalez4,5, Henrique Pierotti Arantes6, Carla M Prado7, Camila Lemos Pinto7, Iana Mizumukai de Araújo8, Francisco José Albuquerque de Paula8, Joao Lindolfo Cunha Borges9, Ben-Hur Albergaria10, Marcela Ushida11, Guilherme Cardenaz de Souza12, Laura Maria Carvalho de Mendonça13, Mirley do Prado14, Marcelo de Medeiros Pinheiro11. 1. Discipline of Endocrinology, Department of Medicine, Universidade Federal de São Paulo (UNIFESP), Rua Estado de Israel, 639, São Paulo, SP, 04022-001, Brazil. ssetsuo@terra.com.br. 2. Department of Nutrition, School of Public Health, Universidade de São Paulo (USP), São Paulo, SP, Brazil. 3. Department of Biosciences, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil. 4. Postgraduate Program in Health and Behavior, Universidade Católica de Pelotas (UCPel), Pelotas, RS, Brazil. 5. Postgraduate Program in Nutrition and Food, Universidade Federal de Pelotas (UFPel), Pelotas, RS, Brazil. 6. School of Medicine, Instituto Master de Ensino Presidente Antônio Carlos (IMEPAC), Uberlândia, MG, Brazil. 7. Department of Agricultural, Food and Nutritional Science, Division of Human Nutrition, University of Alberta, Edmonton, Canada. 8. Department of Internal Medicine, School of Medicine of Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil. 9. Clinical Research Center of Brazil, Brasília, DF, Brazil. 10. Department of Epidemiology, Universidade Federal do Espírito Santo (UFES), Vitória, ES, Brazil. 11. Discipline of Rheumatology, Department of Medicine, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil. 12. Bone d Consultoria e Treinamento, São Paulo, SP, Brazil. 13. Discipline of Rheumatology, Department of Medicine, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil. 14. Clínica Janice Lamas Radiologia, Brasília, DF, Brazil.
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.
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.
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