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Quantitative Assessment of Lumbar Spine Bone Marrow in Patients with Different Severity of CKD by IDEAL-IQ Magnetic Resonance Sequence

Overview
Specialty Endocrinology
Date 2022 Oct 7
PMID 36204094
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Abstract

Background: Chronic kidney disease (CKD) has a significant negative impact on bone health. Bone marrow is an essential component of bone, mainly composed of trabecular bone and fat. The IDEAL-IQ sequence of MRI allows indirect quantification of trabecular bone mass by R2* and direct quantification of bone marrow fat content by FF map, respectively.

Objective: Our objective was to explore the association of CKD severity with bone marrow using IDEAL-IQ and whether mineral and bone metabolism markers alter this association.

Method: We recruited 68 CKD patients in this cross-sectional research (15 with CKD stages 3-4, 26 with stage 5, and 27 with stage 5d). All patients underwent lumbar spine IDEAL-IQ, BMD, and several bone metabolism markers (iPTH, 25-(OH)-VitD, calcium and phosphorus). Multiple linear regression analysis was used to examine the association of CKD severity with MRI measurements (R2* and FF).

Results: More severe CKD was associated with a higher R2* value [CKD 5d versus 3-4: 30.077 s (95% CI: 12.937, 47.217), for trend < 0.001], and this association was attenuated when iPTH was introduced [CKD 5d versus 3-4: 19.660 s (95% CI: 0.205, 39.114), for trend = 0.042]. Furthermore, iPTH had an association with R2* value [iPTH (pg/mL): 0.033 s (95% CI: 0.001, 0.064), = 0.041]. Besides, FF was mainly affected by age and BMI, but not CKD.

Conclusions: The bone marrow R2* value measured by IDEAL-IQ sequence is associated with CKD severity and iPTH. The R2* of IDEAL-IQ has the potential to reflect lumbar bone changes in patients with CKD.

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