优化扫描参数宝石能谱CT测量腰椎骨密度临床效果评价

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...

Evaluation of clinical effect of optimized scanning parameters gem energy spectrum CT in the measurement of bone mineral density of the lumbar vertebrae

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.