MRI对踝关节周围韧带显示效果的研究

发布时间：2018-01-15 00:04

  本文关键词：MRI对踝关节周围韧带显示效果的研究　出处：《青岛大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 踝关节 周围韧带 不同体位扫描 核磁共振成像

【摘要】：目的探讨优化扫描参数、扫描序列状态下,踝关节周围韧带在不同体位MRI上的最佳扫描显示层面,以寻找分辨率高、显示清晰的扫描图像为临床提供更准确的诊断信息。方法首先选用6例男性踝关节标本,分别5种MR序列及3种扫描平面对踝关节进行MR扫描,以选定优化扫描参数、扫描序列;以34例健康志愿者之踝关节为研究对象,根据前述扫描参数、扫描序列行MRI-T1W扫描,评分后对不同体位、不同层面显示效果应用χ2检验做统计学分析。结果(1)对6例男性踝关节标本的扫描结果显示,MRI上应用薄层扫描(2.0/1.0)、FOV(130mm)、矩阵(410×510)及利用表面柔性线圈可以提高MRI扫描分辨率;T1W(T1加权像)序列、PDW(质子密度加权)序列能较好地显示韧带等形态结构,而T2W(T2加权像)序列、T2WSPAIR(T2W压脂序列)能有效显示组织内部构造。(2)内侧韧带:距胫前韧带(ATTL)于自然体位-冠状面、完全跖屈-冠状面显示效果最佳,于3分组分别占26%、36%,显示效果差异不显著(P0.05);距胫前韧带(PTTL)位于完全背屈-横断面时显示图像效果最佳,占3分组66%;胫舟韧带(NTL)使用MRI扫描其完全跖屈-冠状面和完全背屈-横断面时显示效果最佳,差异显著(P0.05);胫腓后韧带(CTL)使用MRI扫描完全背屈-冠状面和完全背屈-横断面能较好显示,占3分组35%、26%,二者差异显著(P0.05)。(3)外侧韧带:距腓前韧带(ATFL)在自然体位-横断面及完全背屈-横断面MRI扫描可全面显示,占3分组39%、37%,且差异不显著(P0.05)。自然体位和完全背屈-冠状面之间显示效果差异不明显(P0.05)。距腓后韧带(PTFL)处于完全背屈-横断面、自然体位-冠状面时MRI扫描图像可完整显示,占3分组49%、34%,两者之间显示差异显著(P0.05);而不同体位矢状面之间显示效果差异不显著(P0.05)。跟腓韧带(CFL)处于自然体位-横断面MRI图像的完整显示效果最佳,占3分组47%;不同体位矢状面之间显示差异不显著(P0.05)。(4)下胫腓联合韧带:胫腓前韧带和胫腓后韧带处于横断面时MRI扫描效果好。胫腓横韧带在自然体位-和完全背屈-横断面时MRI扫描显示效果最佳,占3分组29%、37%,两者差异显著(P0.05)。骨间韧带处于不同体位的冠状面和横断面时对显示较好。结论运用高分辨率MRI仪及表面柔性线圈,对踝关节扫描在小FOV、薄层厚、较大矩阵条件下显示图像分辨率高。MRI多序列、多平面扫描技术对显示踝关节正常解剖结构及异常表现有很大帮助。MRI能清晰地显示踝关节周围韧带解剖结构,踝关节周围韧带各分支有其各自最佳显示体位及截面,从而提高临床诊断的准确率。
[Abstract]:Objective to study the optimal scanning parameters of the ankle periarticular ligament on MRI in different postural positions under the condition of scanning sequence, and to find out the high resolution. To provide more accurate diagnostic information for clinical diagnosis by displaying clear scanning images. Methods 6 cases of male ankle specimens were examined with 5 kinds of Mr sequences and 3 kinds of scanning planes. In order to select the optimized scanning parameters, scan sequence; The ankle joint of 34 healthy volunteers was studied. According to the above scanning parameters, MRI-T1W scanning was performed on the scan sequence, and different postures were scored. 蠂 2 test was used for statistical analysis of the display effect on different levels. Results the results of 6 male ankle specimens showed that thin layer scanning was used on MRI (2.0 / 1.0). The MRI scanning resolution can be improved by using flexible coils. The PDW (proton density weighted) sequence can well display the isomorphous structure of ligaments, while the T2WT 2 weighted image sequence. T2WSPAIRN T2W) can effectively display the internal structure of the tissue. 2) the medial ligament: ATTL) is located in the natural position and coronal plane. The effect of complete plantar flexion-coronal plane was the best, accounting for 26 / 36 in 3 groups respectively, the difference was not significant (P 0.05). PTTL of anterior tibial ligament (PTTL) was best when it was located in complete dorsal flexion-cross section, accounting for 3 groups and 66%; MRI was used to scan the complete plantar flexion-coronal plane and complete dorsiflexion-transverse section, the difference was significant (P 0.05). The posterior tibiofibular ligament (CTL) could be well displayed by MRI scanning with complete dorsal flexion-coronal plane and complete dorsal flexion-transverse section, accounting for 35% and 26% of the 3 groups. There was significant difference between the two groups in the lateral ligaments: the anterior talofibular ligament (ATFLL) could be fully displayed on the natural postural transect and complete dorsiflexion-transverse MRI scans, accounting for 39% in 3 groups. 37%. There was no significant difference between the natural position and the complete dorsal flexion-coronal plane. PTFLL was located in the complete dorsal flexion-cross section. The MRI images of natural posture and coronal plane could be displayed completely, accounting for 3 groups with 49% and 34% respectively. The difference between them was significant (P 0.05). However, there was no significant difference in display effect between sagittal planes of different postures (P 0.05). The complete display of calcaneal ligament in natural position and cross section MRI images was the best, accounting for 47% of the 3 groups. There was no significant difference between sagittal planes in different postures (P0.05. 4). Inferior tibiofibular syndesmosis ligament: tibiofibular anterior ligament and tibiofibular posterior ligament in the transverse section of the MRI scan effect is good. The tibiofibular transverse ligament in the natural position-and complete dorsal flexion-cross-sectional MRI scan is the best. Accounting for 37% of the 3 subgroups. The results showed that the interosseous ligament was well displayed on the coronal and cross sections in different positions. Conclusion High resolution MRI instrument and surface flexible coil are used. The ankle joint was scanned under the condition of small FOV, thin layer thickness and large matrix to show high resolution. MRI multiple sequences. Multiplanar scanning technique is helpful to display the normal anatomical structure and abnormal appearance of ankle joint. MRI can clearly display the anatomical structure of the ligament around the ankle joint. In order to improve the accuracy of clinical diagnosis, each branch of the ligament around the ankle has its own best position and section.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：R684;R445.2
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本文编号：1425875