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AJR Am J Roentgenol. 2003 Apr;180(4):1111-6.

Comparison of imaging-guided and non-imaging-guided quantitative sonography of the calcaneus with dual X-ray absorptiometry of the spine and femur.

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1
Department of Radiology, University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria.

Abstract

OBJECTIVE:

The purpose of our study was to evaluate the diagnostic agreement between imaging-guided and non-imaging-guided quantitative sonography of the calcaneus and dual X-ray absorptiometry of the spine and femur to show osteoporosis.

SUBJECTS AND METHODS:

In 113 patients (73 women, 59 +/- 14 years old; 40 men, 48 +/- 16 years old), dual X-ray absorptiometry of the lumbar spine and the proximal femur, imaging-guided quantitative sonography, and non-imaging-guided quantitative sonography of the calcaneus were performed. The percentage of patients having a T-score equal to or less than a threshold of -2.5 SDs (prevalence of osteoporosis) was calculated for each imaging technique. The diagnostic agreement of the three techniques in identifying individuals with osteoporosis was assessed.

RESULTS:

Eleven percent of the women and 8% of the men were classified as osteoporotic by imaging-guided quantitative sonography, and 38% of the women and 25% of the men were so classified by non-imaging-guided quantitative sonography. At dual X-ray absorptiometry of the spine, 44% of the women and 38% of the men were classified as osteoporotic, and, at different femoral regions, 19-60% of the women and 8-38% of the men were so classified. Kappa analysis for both quantitative sonography techniques was not significant. Kappa analysis for both quantitative sonography techniques and dual X-ray absorptiometry showed diagnostic agreement to be generally poor.

CONCLUSION:

No advantage in diagnostic accuracy could be found for imaging-guided quantitative sonography. The considerable diagnostic disagreement between both quantitative sonography techniques and dual X-ray absorptiometry could be confusing in daily clinical practice.

PMID:
12646464
DOI:
10.2214/ajr.180.4.1801111
[Indexed for MEDLINE]
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