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Table 5 R value according to the composition of each body tissue

From: 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

Component

40 keV

70 keV

R value

Fatty acids

0.22–0.23

 ~ 0.18

1.20–1.22

Triglycerides

 ~ 0.22

 ~ 0.18

 ~ 1.21

Protein

0.2363

0.1831

1.2906

Glycogen

0.2375

0.1825

1.3010

Water

0.2636

0.1942

1.3572

Extracellular fluid

0.2673

0.1946

1.3736

Intracellular fluid

0.2107

0.1955

1.3862

Soft tissue minerals

0.7685

0.2824

2.7213

Bone mineral

0.9039

0.3159

2.8617

Calcium hydroxyapatite

0.9632

0.3283

2.9339

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Advances in Rheumatology

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