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Plain radiographs can be useful in estimating lumbar bone density.
B A Michel1, N E Lane, H H Jones
1Department of Medicine, Stanford University School of Medicine, CA.
The Journal of Rheumatology
|April 1, 1990
Summary
Standard lumbar spine X-rays can estimate bone density in nonosteoporotic individuals. Radiographic assessments of vertebral density and trabeculations correlate with bone mineral content, aiding in decisions for further analysis.
Area of Science:
- Radiology
- Osteoporosis Research
- Bone Densitometry
Background:
- Conventional radiography suggests bone loss is detectable only after significant demineralization (approx. 40%).
- Assessing the accuracy of standard lateral lumbar spine roentgenograms in estimating bone density is crucial for early detection of osteopenia.
Purpose of the Study:
- To evaluate the detectability of bone density changes on standard lateral lumbar spine roentgenograms.
- To compare radiographic findings with quantitative bone mineral content measurements.
Main Methods:
- 80 healthy subjects (mean age 60 years) underwent standard lateral lumbar spine radiography.
- Bone mineral content of the L1 vertebra was quantified using computed tomography (CT).
- Radiographic features including vertebral density, trabecular patterns, and overall osteopenia were assessed.
Main Results:
- Strong correlations were observed between bone mineral content and radiographic criteria: "vertebral density versus soft tissue" (r=0.5), "amount of trabeculations" (r=0.49), and "overall" osteopenia estimate (r=0.55).
- These correlations were most significant in subjects with bone mineral content above 110 mg/cm³ (nonosteoporotic range).
Conclusions:
- Lateral lumbar spine radiographs can provide a reliable estimation of bone density in nonosteoporotic individuals.
- These findings suggest that radiographic assessment can guide decisions for further, more precise bone density analysis.