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Quantitative bone marrow magnetic resonance imaging through apparent diffusion coefficient and fat fraction in multiple myeloma patients

  • Musculoskeletal Radiology
  • Published:
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Abstract

Objective

Quantitative bone marrow (BM) MR sequences, as DWI and CSI, were used to evaluate BM water–fat composition. The aim of the study was to assess the potential usefulness of fat fraction (FF) and ADC, calculated by CSI or DWI, in diagnosing and classifying myeloma (MM) patients according to their different BM infiltration patterns.

Methods

The study group included 43 MM patients (19F; 24M; mean age 64 years), 15 asymptomatic, 15 symptomatic with diffuse BM infiltration and 13 symptomatic with focal lesions (FLs). The control group was made up of 15 healthy subjects (7F; 8M; mean age 64 years). MRI examinations consisted of sagittal T1w TSE on the spinal column, axial DWI (b 50–400–800 mm2/s) and coronal T2 Dixon, on the whole body. Mean ADC and FF were calculated placing 1 ROI on 6 vertebras and 2 ROIs on either the pelvis or FL.

Results

ANOVA with Bonferroni’s correction showed a significant difference in ADC values among the different groups of MM patients (P < 0.05), while FF was only significantly different between patients with diffuse infiltration and patients with FL (P = 0.002). ADC allowed distinguishing MM patients from normal BM patients with diffuse BM infiltration (cutoff value: 0.491 × 10−3 mm2/s; sensitivity 73%, specificity 80%). FF helped better discriminate healthy controls from normal BM patients (cutoff = 0.33, sensitivity 73%, specificity 92%) and patients with diffuse BM infiltration from those with FL (cutoff = 0.16, sensitivity 82%, specificity 92%).

Conclusion

ADC and FF are potentially useful parameter for the quantitative evaluation of BM infiltration in MM patients.

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The authors of this paper have no financial or personal relationship with people or association which could influence the content of the paper.

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Contributions

SB: radiology resident; data collection and drafting of the article. LS: radiology resident; data collection and drafting of the article. SA: performed all statistical analyses. AC: radiologist, Professor of Piemonte Orientale University; Proofreader of the article. AS: radiologist, Professor of Piemonte Orientale University; Proofreader of the article.

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Correspondence to Sara Berardo.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the Italian ethical guidelines for retrospective studies and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Berardo, S., Sukhovei, L., Andorno, S. et al. Quantitative bone marrow magnetic resonance imaging through apparent diffusion coefficient and fat fraction in multiple myeloma patients. Radiol med 126, 445–452 (2021). https://doi.org/10.1007/s11547-020-01258-z

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  • DOI: https://doi.org/10.1007/s11547-020-01258-z

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