Youth osteopenia evaluated using MR chemical-shift imaging combined with BMI

WANG Shanshan; CHEN Zuqin; HE Sijian; ZHANG Quan; ZHOU Xin; BI Xun; YUAN Fei

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Medical Journal of the Chinese People Armed Police Forces ›› 2020, Vol. 31 ›› Issue (3) : 233-236.

ORIGINAL ARTICLES

Youth osteopenia evaluated using MR chemical-shift imaging combined with BMI

WANG Shanshan^1,2,3, CHEN Zuqin^1,2,4, HE Sijian², ZHANG Quan², ZHOU Xin², BI Xun², YUAN Fei²

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Abstract

ObjectiveTo investigate the applicability of chemical shift imaging combined with BMI(Body Mass Index) in diagnosing osteopenia among young patients.Methods A total of 67 youths were divided into the osteopenia group (n=38) and healthy group (n=29) according to the results of DXA(dual-energy X-ray absorptiometry). The fat fraction (FF) of the patella and BMI were measured and compared between the two groups. The receiver operating characteristic curve was used to analyze the (ROC) diagnostic value of each of the two indexes or the combination of the two indexes.Results The FF of the osteopenia group was higher than that of the healthy group[(80.5±1.4) vs (78.6±1.2),P＜0.01], while BMI of the osteopenia group was lower[(20.2±1.9) vs (23.1±2.0), P＜0.01]. The sensitivity, specificity and the AUC of the FF for diagnosis of osteopenia were 68.4%, 75.9% and 0.808 (95%CI: 0.693,0.894)respectively, compared with 73.4%, 89.7% and 0.858 (95%CI: 0.751,0.931)for BMI and 86.8%, 86.2% and 0.920 (95%CI:0.858,0.982)for the combination of the two indexs. The combined index was better than FF or BMI alone in diagnosis of osteopenia (P=0.0136,P=0.0187). Conclusions MR chemical shift imaging combined with BMI can accurately diagnose osteopenia, so it can be used as a reliable method to evaluate bone mass of youths.

Key words

youth / osteopenia / bone marrow / magnetic resonance imaging / fat

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WANG Shanshan, CHEN Zuqin, HE Sijian, ZHANG Quan, ZHOU Xin, BI Xun, YUAN Fei. Youth osteopenia evaluated using MR chemical-shift imaging combined with BMI[J]. Medical Journal of the Chinese People Armed Police Forces. 2020, 31(3): 233-236

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