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Assessing osteoporosis in postmenopausal women: preliminary results using a novel lumbar spine phantom-based MRI scoring method

  • Magnetic Resonance Imaging
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Abstract

Objective

To develop a novel magnetic resonance imaging (MRI) phantom for producing F-score (for fat) and W-score (for water) and to evaluate the performance of these scores in assessing osteoporosis and related vertebral fractures.

Materials and methods

First, a real-time phantom consisting of oil and water tubes was manufactured. Then, 30 female volunteers (age: 62.3 ± 6.3 years) underwent lumbar spine examination with MRI (using a novel phantom) and dual-energy X-ray absorptiometry (DXA), following ethical approval. MRI phantom-based F-score and W-score were defined by normalizing the vertebral signal intensities (SIs) by the oil and water SIs of the phantom on T1- and T2-weighted images, respectively. The diagnostic performances of the new scores for assessing osteoporosis and vertebral fractures were examined using receiver operating characteristic analysis and compared with DXA-measured areal bone mineral density (DXA-aBMD).

Results

The F-score and W-score were greater in the osteoporotic patients (3.93 and 2.29) than the non-osteoporotic subjects (3.05 and 1.79) and achieved AUC values of 0.85 and 0.74 (p < 0.05), respectively, when detecting osteoporosis. Similarly, F-score and W-score had greater values for the fracture patients (3.94 and 2.53) than the non-fracture subjects (3.14 and 1.69) and produced better AUC values (0.90 for W-score and 0.79 for F-score) compared to DXA-aBMD (AUC: 0.27, p < 0.05). In addition, the F-score and W-score had a strong correlation (r = 0.77; p < 0.001).

Conclusion

A novel real-time lumber spine MRI phantom was developed, based upon which newly defined F-score and W-score were able to detect osteoporosis and demonstrated an improved ability over DXA-aBMD in differentiating patients with vertebral fractures.

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Funding

Funding from the National Natural Science Foundation of China (12272017) and Beijing Natural Science Foundation (L232058) is acknowledged.

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Correspondence to Haisheng Yang.

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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.

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This research involving human participants was conducted as per the Declaration of Helsinki, and informed consent was taken.

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Appendix

Appendix

See Fig. 7.

Fig. 7
figure 7

a The positive correlation between the F-score and W-score indicates changes in fatty marrow and water-like content in the same direction. b The negative correlation between aBMD and F-score suggesting that an increase in fatty marrow (replacement) is associated with reduced bone mineral density

See Table 5.

Table 5 Specifications of the MRI phantom materials and relevant safety measures

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Din, R.U., Nishtar, T., Cheng, X. et al. Assessing osteoporosis in postmenopausal women: preliminary results using a novel lumbar spine phantom-based MRI scoring method. Radiol med (2024). https://doi.org/10.1007/s11547-024-01814-x

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