CT多平面重组矢状位在LVAS诊断中的应用

发布时间：2018-04-13 05:14

本文选题：多层螺旋CT + 多平面重组　；参考：《青岛大学》2017年硕士论文

【摘要】：目的:运用多层螺旋CT(MSCT)扫描得出的原始数据,进行多平面重组(MPR)后处理。在重组矢状面图像上,对前庭导水管中段宽度值进行测量,并建立95%的医学参考值范围,对其规律进行探讨,探讨矢状位做为诊断标准的可行性。方法:搜集研究正常观察对象80例,男38例,女42例,年龄9月至72岁,均无听力异常现象。对颞骨进行MSCT扫描,利用MSCT各向同性的扫描技术,将所得原始图像行MPR后处理,重组两侧前庭导水管矢状位图像,计算导水管后肢全程显示率。测量前庭导水管在重组矢状位图像上中段的宽度,按照左右两侧及男女性别分组,记录测量数据。对左右侧及男女分组数据进行统计学分析,观察有无统计学意义,并建立95%的医学参考值范围。另外,搜集16例临床表现为听力异常,颞骨MSCT扫描后,横轴位测量初步诊断为LVAS患者,利用各向同性技术,将所得图像行MPR后处理,重组两侧前庭导水管矢状位图像,记录导水管中段宽度数值,与正常观察对象进行统计学分析。结果:1、MPR后处理重组出的矢状位图像,对前庭导水管的显示率高于直接扫描获得的横轴位图像显示率。2、正常前庭导水管重组矢状位图像在左右两侧及男女性别间无差异统计学意义。3、正常组导水管中段宽度值在重组矢状位方向上95%的医学参考值范围:左侧0.49-0.98mm;右侧0.52-1.03mm。4、16例临床诊断为听力异常患者,横轴位测量初步诊断为LVAS患者,重组矢状位中段宽度值范围1.2mm至3.9mm,与正常组比较有统计学差异。结论:1.前庭导水管后肢在重组矢状位上的显示较直接轴位更符合解剖学形态,更精确反映前庭导水管的大小,并且制订出前庭导水管中段宽度值95%的正常值范围。2.在重组矢状位图像上,前庭导水管中段宽度值大于等于1.1mm,诊断为前庭导水管扩大。同时伴有临床听力异常及相应病史,诊断为大前庭导水管综合征。
[Abstract]:Aim: to use the original data obtained by multilayer spiral CT MSCT (MSCT) scan to carry out multiplanar recombination MPRs post-processing.The width of the vestibular aqueduct was measured on the reconstructed sagittal image and the 95% range of medical reference value was established. The regularity was discussed and the feasibility of using sagittal position as diagnostic criterion was discussed.Methods: 80 normal subjects, 38 males and 42 females, aged from 9 months to 72 years, had no abnormal hearing.The temporal bone was scanned by MSCT, and the original image was processed with MPR by using MSCT isotropic scanning technique. The sagittal image of the vestibular aqueduct was reconstructed and the full display rate of the posterior limb of the aqueduct was calculated.The width of vestibular aqueduct in the middle of the reconstructed sagittal image was measured.The data of left and right sides and male and female groups were analyzed statistically, and the 95% medical reference value range was established.In addition, 16 cases with abnormal hearing were collected. After MSCT scan of temporal bone, transaxial measurement was used to diagnose LVAS. Using isotropic technique, the images were processed by MPR, and the sagittal images of vestibular aqueduct were reconstructed.The width of the middle section of the aqueduct was recorded and analyzed statistically with the normal subjects.Results the reconstructed sagittal image was processed by 1: 1 MPR.The display rate of vestibular aqueduct was higher than that of axial image. The sagittal image of normal vestibular aqueduct was not significantly different between the right and left sides and between male and female.The range of medical reference values of 95% in the sagittal direction of the recombination was 0.49-0.98mm on the left side and 0.52-1.03mm .4mm on the right side in 16 clinically diagnosed patients with abnormal hearing.The width of the median sagittal segment of the reconstituted sagittal position was 1.2mm to 3.9 mm, which was significantly different from that of the normal group.Conclusion 1.The posterior limb of vestibular aqueduct was more conformed to anatomical shape and more accurately reflected the size of vestibular aqueduct than that of direct axis, and the normal value range of 95% width of vestibular aqueduct was worked out.On the reconstructed sagittal image, the width of the vestibular aqueduct was greater than 1.1 mm, which was diagnosed as vestibular aqueduct enlargement.At the same time, accompanied by clinical hearing abnormalities and the corresponding history, the diagnosis of large vestibular aqueduct syndrome.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R764;R816.96

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