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[Experimental validation of DXA and MRI-based bone density measurement by ash-method].
C Becker1, A W Baltzer, M Schneppenheim
1Orthopädische Klinik, Heinrich Heine-Universität, Düsseldorf.
Zentralblatt Fur Chirurgie
|June 9, 2001
Summary
Magnetic resonance imaging (MRI) can assess bone density in lumbar vertebrae, correlating well with dual energy X-ray absorptiometry (DXA) and mineral content. This non-invasive method offers early detection of spinal abnormalities without radiation.
Area of Science:
- Biomedical Imaging
- Orthopedics
- Radiology
Background:
- Established bone density measurement methods include dual energy X-ray absorptiometry (DXA), quantitative computed tomography (QCT), and scintigraphy (VQ-Scan).
- Magnetic resonance imaging (MRI) shows potential as a novel tool for evaluating bone density.
Purpose of the Study:
- To investigate the correlation between MRI and DXA for bone density assessment.
- To examine the relationship between MRI and the mineral content of lumbar vertebrae.
Main Methods:
- Analysis of ten cattle lumbar vertebral bodies using T1-weighted SE, PS, and T2-weighted STIR MRI sequences.
- Determination of total pixel numbers and pixel-per-area ratios from MRI scans.
- Comparison of MRI data with DXA measurements and ashing results for mineral content (wet weight, spongious, trabecular, total).
Main Results:
- Significant correlations were found between DXA and mineral content by ash-method (0.918; p < 0.01).
- Strong correlations were observed between DXA and MRI (SE-sequence) (-0.872; p < 0.01), and MRI (SE-sequence) and mineral content (0.775; p < 0.01).
- No significant correlations were found between PS or STIR sequences and the ash-method.
Conclusions:
- The T1-weighted SE MRI sequence is effective for determining vertebral bone mineral content.
- MRI offers a radiation-free alternative for bone density assessment.
- MRI facilitates early detection of trabecular lesions, fractures, and deformities in the spine.