定量CT评价股骨近段骨皮质厚度及骨密度

发布时间：2018-05-22 14:20

本文选题：体层摄影术 + X线计算机　；参考：《中国医学影像技术》2015年10期

【摘要】：目的初步探讨采用定量CT(QCT)骨结构分析系统(BIT)测量股骨近段骨皮质的信度和可重复性。方法收集30例髋部低能量骨折患者,正常侧股骨用于测量,采集髋部QCT扫描数据,于QCT分析工作站上BIT自动选定垂直于股骨颈中段长轴最狭窄处横断面,将该横断面分为4个象限,即上前象限(SA),下前象限(IA),下后象限(IP),上后象限(SP),BIT自动估算各象限骨皮质厚度(C.Th),由3名测量者分别进行测量,比较测值的差异及一致性。结果 3名测量者测得的股骨颈最狭窄处横断面平均C.Th及SA、SP、IA象限C.Th和骨密度差异均无统计学意义(P均0.05),一致性均较好,其中平均C.Th的ICC值最高,为0.883。而3名测量者测得的IP象限C.Th和骨密度差异均有统计学意义(P均0.05)。结论 BIT能够实现获取股骨近段骨密度结果的同时获得骨结构信息,测得的股骨颈横断面上象限及前下象限C.Th及骨密度具有很好的重复性。
[Abstract]:Objective to investigate the reliability and reproducibility of quantitative CTQCT-based bone structure analysis system (bit) in measuring proximal femur cortex. Methods 30 patients with low energy fracture of hip were collected. The normal femur was measured and the QCT scan data of hip were collected. The cross section perpendicular to the middle long axis of femoral neck was automatically selected by BIT on QCT analysis workstation. The cross section was divided into four quadrants, I. e., the anterior quadrant, the lower quadrant and the lower quadrant, respectively. The thickness of the bone cortex in each quadrant was estimated automatically by sphiobit bit. The measurements were carried out by three subjects, and the difference and consistency of the measured values were compared. Results the mean cross-sectional C.Th and C.Th and bone mineral density in the most narrow femoral neck were not significantly different between the three subjects (P < 0.05). The average ICC value of C.Th was the highest (0.883). The differences of IP quadrant C.Th and bone mineral density in 3 subjects were statistically significant (P < 0.05). Conclusion BIT can obtain the bone structure information of proximal femur, and the C.Th and BMD of the upper quadrant and anterior inferior quadrant of femoral neck can be measured with good reproducibility.
【作者单位】：北京积水潭医院放射科;南方医科大学珠江医院放射科;重庆医科大学附属第一医院神经内科;北京积水潭医院创伤骨科;
【基金】：北京市卫生系统高层次卫生技术人才培养项目(2009-02-03) 首都卫生发展科研专项自主创新项目(2014-2-112) 首都临床特色应用研究项目(z141107002514072) 南方医科大学“科研启动计划”青年科技人员培育项目(PY2014N067)
【分类号】：R683;R816.8

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