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Relationship Between Femoral Proximal Bone Quality Assessment by MRI IDEAL-IQ Sequence and Body Mass Index in Elderly Men

Overview
Journal Tomography
Publisher MDPI
Specialty Radiology
Date 2024 May 24
PMID 38787022
Authors
Affiliations
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Abstract

Background: Bone assessment using the MRI DEAL-IQ sequence may have the potential to serve as a substitute for evaluating bone strength by quantifying the bone marrow hematopoietic region (R2*) and marrow adiposity (proton density fat fraction: PDFF). Higher body mass index (BMI) is associated with increased bone mineral density (BMD) in the proximal femur; however, the relationship between BMI and R2* or PDFF remains unclear. Herein, we investigated the correlation between BMI and MRI IDEAL-IQ based R2* or PDFF of the proximal femur.

Methods: A retrospective single-cohort study was conducted on 217 patients diagnosed with non-metastatic prostate cancer between September 2019 and December 2022 who underwent MRI. The correlation between BMI and R2* or PDFF of the proximal femur was analyzed using Spearman's rank correlation test.

Results: Among 217 patients (median age, 74 years; median BMI, 23.8 kg/m), there was a significant positive correlation between BMI and R2* at the right and left proximal femur (r = 0.2686, < 0.0001; r = 0.2755, < 0.0001, respectively). Furthermore, BMI and PDFF showed a significant negative correlation (r = -0.239, = 0.0004; r = -0.2212, = 0.001, respectively).

Conclusion: In elderly men, the increased loading on the proximal femur due to elevated BMI was observed to promote a decrease in bone marrow adiposity in the proximal femur, causing a tendency for a transition from fatty marrow to red marrow with hematopoietic activity. These results indicate that the MRI IDEAL-IQ sequence may be valuable for assessing bone quality deterioration in the proximal femur.

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