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Comparison Between Metacarpal Bone Measurements by Computarized Radiogrammetry and Total Body DEXA in Normal and Osteoporotic Women

Overview
Journal Clin Rheumatol
Publisher Springer
Specialty Rheumatology
Date 1994 Dec 1
PMID 7697961
Citations 4
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Abstract

We evaluated the precision of metacarpal radiogrammetry by computed radiography as a technique for bone mass measurement. Measurements obtained using this method were compared with densitometric measurements of total body bone mass using dual-energy X-ray absorptiometry. Our results showed that the coefficients of variation for radiogrammetric measurements were similar in 60 women with osteoporosis and in 100 normal women: 0.7% in both groups for external diameter of the second metacarpal, 2.41% in the normal women and 2.03% in the women with osteoporosis for internal diameter, and 2.3% and 2.4%, respectively, for cortical thickness. Except for external metacarpal diameter, which did not differ between normal and osteoporotic women, all the measurements were smaller in the women with osteoporosis (p < 0.001). The correlation between metacarpal cortical thickness and total body bone mineral content was r2 = 0.462 in the women with osteoporosis, r2 = 0.476 in the controls, and r2 = 0.522 in the two groups combined (all p < 0.001). There was a significant correlation (p < 0.001) between cortical thickness and densitometric metacarpal measurements of both the diaphysis and epiphysis. These results confirm the value of radiogrammetry as a technique for quantitating bone mass under normal and pathological conditions. Additional advantages of the method are minimal radiation dose delivered, possibility for storing the image and data, and technical facility.

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