锥形束CT与螺旋CT对髁突成像三维重建后线性测量准确性和可靠性的评价

  本文关键词：锥形束CT与螺旋CT对髁突成像三维重建后线性测量准确性和可靠性的评价，，由笔耕文化传播整理发布。

        目的本研究的目的是评价锥形束CT与螺旋CT对髁突成像三维重建后线性测量的准确性和可靠性。材料和方法选取10个干燥的完整的40-60岁的成年男性的下颌骨,分别采用意大利维罗纳Quantitative Radiology公司生产的Newtom3G CBCT机和美国通用电器公司生产Light Speed16层螺旋CT机对其进行扫描,然后将获得的CT数据导入Mimics10.01软件,三维重建其相应的三维数字化模型。本研究选取12个测量项目对髁突进行了系统的测量。两名研究员在2周内分别对锥形束CT数字化模型、螺旋CT数字化模型和髁突实体进行3次测量,并将6次测量的平均值分别作为锥形束CT测量值、螺旋CT测量值、实体测量值。采用SPSS13.0统计软件分别对锥形束CT测量数据与实体测量值、螺旋CT测量值与实体测量值、锥形束CT测量数据与螺旋CT测量值进行统计分析,以P≤0.05为检验水准,用配对t检验,比较不同测量方法之间的一致性。测量的准确性用平均绝对误差和平均绝对百分误差评价。以P≤0.05为检验水准,用配对t检验的方法比较锥形束CT和螺旋CT对髁突三维重建后线性测量的准确性。用两因素方差分析对研究员自身和研究员之间的测量值进行统计,研究员自身和研究员之间测量的可靠性用组内相关系数来评价。结果1.三种测量方法所测得的数据相互之间无明显统计学差异(P>0.05)。锥形束CT对髁突成像三维重建后的线性测量与螺旋CT对髁突成像三维重建后的线性测量有一致性。2.锥形束CT对髁突三维重建后线性测量的准确性与螺旋CT对髁突三维重建后线性测量的准确性之间无统计学差异。锥形束CT的平均绝对误差为0.27mm(±0.19mm),螺旋CT的平均绝对误差为0.20mm(±0.17mm)。锥形束CT和螺旋CT的平均绝对百分误差分别为0.98%(±0.73%)和1.26%(±1.50%)。3.锥形束CT和螺旋CT的研究员自身和研究员之间测量值的组内相关系数均大于0.9,有较好的测量可靠性结论锥形束CT测量的准确性虽然比螺旋CT三维测量的准确性略小,但仍具有较好的准确性和可靠性,可以作为一种对患者损伤小、能准确、便捷获得三维图像的影像学方法,替代螺旋CT用于髁突的临床检查和研究。

    ObjectiveThe purpose of this study was to evaluate the accuracy and reliability of condylar three-dimensional reconstruction linear measurements obtained from cone beam CT (CBCT) and multislice CT (MSCT)Materials and Methods10dry male mandibles aged form40-60years old were selected. The mandibles were scanned with NewTom3G CBCT(Quantitative Radiology, Verona. Italy) and Light Speedl6MSCT(General Electric, America). Mimics10.01software was used for three-dimensional reconstruction and measurements on imaging data. Twelve interlandmark linear measurements were made directly on the condyle and compared with the same measurements made on the CBCT scans and MSCT scans. All measurements were made by2operators on3separate occasions. The CT measurements were established as the mean of the6measurements. Anatomic truth was established with6direct caliper measurements. Analysis of the data was conducted by using SPSS13.0statistical software. The consistency among the three measurements was analyzed by paired t test. A P value of P≤0.05was used to assign statistical significance. The accuracy of these measurements was expressed by means of the absolute error (MAE) and absolute percentage error (APE).As a measure of reliability, the intraclass correlation coefficient (ICC) for absolute agreement based on a2-way random-effects analysis of variance (ANOVA) was calculated among the3measurement methods.Results1.No significant statistical differences among the three measurement methods(P>0.05). Linear measurements of condylar three-dimensional reconstruction obtained from CBCT were consistent with MSCT.2. No significant statistical differences between the measurement accuracy of CBCT and MSCT.MAE was0.27mm (±0.19mm) for the CBCT device and0.20mm (±0.17mm) for the MSCT device. APE was0.98%(±0.73%) and1.26%(±1.50%), respectively.3. The ICC of the measurements of the images of CBCT and MSCT were all more than0.9. The reliability of condylar three-dimensional reconstruction linear measurements obtained from cone beam CT and multislice CT was good.ConclusionMSCT scans proved slightly more accurate in linear measurement. The accuracy and the reliability of CBCT were good. CBCT device can be used in condylar clinical examination instead of MSCT device.

          锥形束CT与螺旋CT对髁突成像三维重建后线性测量准确性和可靠性的评价

中文摘要6-8ABSTRACT8-9符号说明10-11前言11-15材料与方法15-19结果19-20讨论20-22结论22-23附图23-25附表25-29参考文献29-35综述 锥形束CT技术及其在正畸中的应用35-50    参考文献41-50致谢50-51攻读学位期间发表的学术论文51

  本文关键词：锥形束CT与螺旋CT对髁突成像三维重建后线性测量准确性和可靠性的评价，由笔耕文化传播整理发布。