Engineering Product Development (EPD) Pillar, Singapore University of Technology and Design (SUTD), Singapore, Singapore.
Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.
Front Endocrinol (Lausanne). 2021 Jan 19;11:526332. doi: 10.3389/fendo.2020.526332. eCollection 2020.
PURPOSE: To investigate the feasibility of using routine clinical multidetector computed tomography (MDCT) scans for conducting finite element (FE) analysis to predict vertebral bone strength for opportunistic osteoporosis screening. METHODS: Routine abdominal MDCT with and without intravenous contrast medium (IVCM) of seven subjects (five male; two female; mean age: 71.86 ± 7.40 years) without any bone disease were used. FE analysis was performed on individual vertebrae (T11, T12, L1, and L2) including the posterior elements to investigate the effect of IVCM and slice thickness (1 and 3 mm) on vertebral bone strength. Another subset of data from subjects with . without osteoporotic vertebral fractures (n = 9 age and gender-matched pairs) was analyzed for investigating the ability of FE-analysis to differentiate the two cohorts. Bland-Altman plots, box plots, and coefficient of correlation (R) were calculated to determine the variations in FE-predicted failure loads for different conditions. RESULTS: The FE-predicted failure loads obtained from routine MDCT scans were strongly correlated with those from without IVCM (R 0.91 for 1mm; R = 0.92 for 3mm slice thickness, respectively) and different slice thicknesses (R = 0.93 for 1mm . 3mm with IVCM). Furthermore, a good correlation was observed for 3mm slice thickness with IVCM . 1mm without IVCM (R = 0.87). Significant difference between FE-predicted failure loads of healthy and fractured patients was observed (4,705 ± 1,238 . 4,010 ± 1,297 N; p=0.026). CONCLUSION: Routine clinical MDCT scans could be reliably used for assessment of fracture risk based on FE analysis and may be beneficial for patients who are at increased risk for osteoporotic fractures.
目的:研究使用常规临床多层螺旋 CT(MDCT)扫描进行有限元(FE)分析以预测偶发性骨质疏松症筛查的椎体骨强度的可行性。
方法:使用 7 名无任何骨疾病受试者(5 名男性;2 名女性;平均年龄:71.86 ± 7.40 岁)的常规腹部 MDCT 平扫和增强扫描,分别对 T11、T12、L1 和 L2 椎体(包括后结构)进行 FE 分析,以研究静脉对比剂(IVCM)和层厚(1mm 和 3mm)对椎体骨强度的影响。对另一组无(n=9)和有(n=9)骨质疏松性椎体骨折的受试者的数据进行分析,以研究 FE 分析区分这两组的能力。Bland-Altman 图、箱线图和相关系数(R)用于确定不同条件下 FE 预测失效负荷的变化。
结果:FE 预测的失效负荷与无 IVCM 的 MDCT 扫描(1mm 时 R=0.91,3mm 时 R=0.92)和不同的层厚(1mm 时 R=0.93,3mm 时 R=0.92)密切相关。此外,观察到 3mm 层厚 IVCM 与 1mm 无 IVCM 之间有很好的相关性(R=0.87)。FE 预测健康和骨折患者的失效负荷有显著差异(4705 ± 1238 N 和 4010 ± 1297 N;p=0.026)。
结论:常规临床 MDCT 扫描可用于基于 FE 分析的骨折风险评估,可能对骨质疏松性骨折风险增加的患者有益。
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