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| 优化扫描参数宝石能谱CT测量腰椎骨密度临床效果评价 |
| Evaluation of clinical effect of optimized scanning parameters gem energy spectrum CT in the measurement of bone mineral density of the lumbar vertebrae |
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| DOI：10.3969/j.issn.1006-7108.2021.03.005 |
| 中文关键词: 能谱CT 参数优化 骨密度 |
| 英文关键词:energy spectrum CT parameter optimization bone mineral density |
| 基金项目: |
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| 中文摘要: |
| 目的 探讨优化扫描参数的宝石能谱CT测量人体L2、L3椎体骨密度的临床应用效果。方法 研究组：本院同时接受腹部或腰椎宝石能谱CT检查和QCT检查的患者126例，男性60例，女性66例；年龄15~92岁。能谱CT采用优化后的扫描参数（管电流260 mA,球管转速0.8 s/r），重建的1.25 mm图像传至AW4.6工作站并测量L2、L3椎体的HAP（脂）值；QCT图像传至Mindways工作站并测量L2、L3椎体的骨密度值。对照组：本院前期同时接受腹部或腰椎宝石能谱CT检查（采用机器默认参数，管电流375 mA，球管转速0.7 s/r）和QCT检查的57例患者。采用统计学软件SPSS 25.0对研究组及对照组L2、L3椎体的HAP（脂）值与QCT骨密度值行Pearson相关性分析，对其组间差异采用方差分析；采用统计学软件MedCalc对研究组与对照组的相关系数行相关系数对比检验。结果 研究组及对照组L2、L3椎体HAP（脂）值与QCT骨密度值均具有显著相关性；研究组内各亚组HAP（脂）值与QCT骨密度值相关性较对照组更高；研究组CTDIvol（mGy）较对照组明显减低。结论 优化扫描参数的宝石能谱CT对腰椎骨密度测量结果与QCT测量的一致性更好。 |
| 英文摘要: |
| Objective To investigate the clinical effect of optimized scanning parameters of gem energy spectrum CT in the measurement of bone mineral density (BMD) of human L2 and L3 vertebral bodies. Methods Study group:In our hospital, 126 patients (60 males and 66 females, age from 15 to 92 years old) underwent abdominal or lumbar gem energy spectrum CT and QCT simultaneously. Optimized scanning parameters (tube current 260 mA, ball tube rotation rate 0.8 s/r)were adopted in energy spectrum CT. The reconstructed 1.5 mm image was transmitted to an AW4.6 workstation. The HAP (lipid) values of L2 and L3 vertebral bodies was measured. The QCT images were transferred to the Mindways workstation and the BMD values of L2 and L3 vertebral bodies were measured. Fifty-seven patients were in control group, who received both abdominal or lumbar gem energy spectrum CT examination (using the default parameters of the machine, tube current 375mA, ball tube rotation rate 0.7s/r) and QCT examination in the early period in our hospital. Statistical software SPSS 25.0 was used to analyze the Pearson correlation between HAP (lipid) and QCT BMD of L2 and L3 vertebral bodies in the study group and the control group. Statistical software MedCalc was used to test the correlation coefficients of the study group and the control group. Results HAP (lipid) of L2 and L3 vertebral bodies in the study group and the control group had significant correlation with QCT BMD. The correlation between HAP (lipid) values and QCT BMD values in the subgroups in the study group was higher than that in the control group. CTDIvol (mGy) in the study group was significantly lower than that in the control group. Conclusion Gem energy spectrum CT with optimized scanning parameters is more consistent with QCT measurement. |
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