显微线圈在近侧指间关节MRI中应用的初步研究  

MRI with microscopy coil of the proximal interphalangeal joints： preliminary study

作　　者：刘敏[1] 孟悛非[2] 孙海兴[1] 刘迪敏[1] 胡关玉[1] 陈应明[2] 盘顺平[1] 王萍[1] 黄小玲[1] 

机构地区：[1]中山大学第一附属医院黄埔院区放射科,广州510700 [2]中山大学第一附属医院放射科

出　　处：《中华放射学杂志》2009年第8期867-871,共5页Chinese Journal of Radiology

摘　　要：目的初步了解显微线圈在近侧指间关节（PLI）MR检查中的应用情况，为细微解剖结构病变的MR诊断奠定基础。方法采用1．5TMR扫描仪。7名正常志愿者的12个近侧指间关节分别使用显微线圈及C3线圈扫描。4个人体近侧指间关节标本使用显微线圈采用相同参数扫描。观察近侧指间关节标本横断、矢状及冠状面解剖结构，选择适合显示各结构的序列。在选出的序列中对志愿者图像进行评分，并采用配对资料的符号秩和检验对比成像参数相同时矢状面T1WI志愿者显微线圈及C3线圈图像质量。结果显微线圈各序列图像能分别显示近侧指间关节及周围主要结构。志愿者12个PIJ中有11个关节结构均评为3或4分。C3线圈组12个PIJ均评为0或1分。志愿者显微线圈组及C3线圈组矢状面T1WI对比，显微线圈组近节指骨头、中节指骨底、关节软骨及掌板评分均高于C3线圈组。两组中上述结构评分比较Z值分别为-3．274、-3．274、-3．213及-3．742，P值均〈0．01。结论显微线圈可以清晰显示近侧指间关节主要结构，在指间关节的MR检查中具有优势。Objective To investigate the use of a microscopy coil in MR examination of proximal interphalangeal joints （PIJ） to collect evidence on micro-anatomical pathological changes for further MR diagnosis. Methods Four PIJ in cadaver and 12 PIJ from 7 normal volunteers were scanned with a microscopy surface coil （23 mm in diameter） at 1.5 T MRI. Sagittal T1-weighted images were also obtained with a conventional surface coil using the same parameters for the volunteers. Based on the observation of sagittal,traverse, coronal PIJ imaging features of cadaver, the optimized sequences were chosen for the volunteer＇s application. Image quality of the PIJ structures from volunteers was analyzed by two radiologists on a 5-point scale （0, nonvisualization;1, poor; 2, average; 3, good;4, excellent） and compared with Wilcoxon signed rank test between the microscopy and C3 surface coil in sagittal direction. Results With microscopy coil all sequences can visualize the main structures of PIJ, and all the PIJ images were classified as good or excellent except for one as average, while all the 12 PIJ with C3 coil were classified as poor or invisible. PIJ structures （ proximal phalanx head, middle phalanx base, cartilage, volar plate） from volunteers show higher scores of quality with microscopy coils than those with C3 coil, and the difference was significant （Z = -3. 274, -3. 274, -3. 213,and - 3. 742 respectively, all P 〈0. 01 ）. Conclusion High-resolution MRI of the normal PIJ with microscopy coil was superior to those with a conventional surface coil, and it can be a promising method to diagnose interphalangeal joints lesions.

关 键 词：指关节 磁共振成像 解剖学比较 

分 类 号：R686[医药卫生—骨科学]