【摘要】 目的探讨CT扫描层厚度不同对椎弓根钉道参数CT测量结果影响的程度。方法将椎骨标本摆放为不同的倾斜角度,分别采用2.5 mm和0.625 mm层厚进行CT扫描重建,由两位测量者分别对椎弓根钉道参数进行测量,每人测量两次。对相同倾斜角度、不同CT层厚间的椎弓根钉道各CT参数分别进行配对t检验。结果 2.5mm与0.625 mm层厚组的部分长度和角度测量结果(P>0.05)在统计学上没有显著性的差异,而椎弓根钉道的宽度测量结果(P<0.05)在统计学上存在显著性的差异。结论与0.625 mm层厚相比,采用2.5 mm层厚进行CT扫描时不会引起CT测量误差的增加,其中椎弓根钉道的宽度除外。更多还原

【Abstract】 Objective To evaluate CT thickness effection to the accuracy of the pedicle screw parameters. Methods A vertebra located in different rotational angles was scanned twice with the CT thickness of 2. 5 mm and 0. 625 mm. Two observers measured twice the pedicle screw parameters double-blindedly. The data from the 2. 5 mm and 0. 625 mm groups were analyzed with SPSS10. 0( Paired-Samples TTest). Results The measuring data of some distances and angels( P > 0. 05) from the 2. 5mm and 0. 625 mm groups were not significantly different statistically. The width of the pedicle screw measuring data( P < 0. 05) from the 2. 5mm and 0. 625 mm groups were significantly different statistically. Conclusion There is not more error increased in the pedicle screw CT parameters from the 2. 5 mm group than from the 0. 625 mm group except the width of the pedicle screw.更多还原