三维快速梯度回波序列在观察颅颈交界区韧带结构中的应用

目的： 探讨磁共振的三维快速梯度回波序列(three-dimensional fast gradient echo sequence，3D-GRE)对颅 颈交界区韧带结构的显示价值。方法： 21 例健康志愿者进行3D-GRE成像检测，将成像数据导入后处理工作站，应 用多平面重建技术对颅颈交界区各韧带结构进行观察、评估。结果： 21 例健康志愿者的图像皆清晰显示颅颈交界区 各韧带结构特点，扫描时间为267~294 s，经三维重建后可有效显示寰椎横韧带、翼状韧带、齿状尖韧带、覆膜的信 号特点及走行结构。结论： 3D-GRE能够在短时间内获取颅颈交界区韧带结构的三维数据，通过后处理重建技术能 够清晰评价各韧带的结构特点，可为进一步应用于颅颈部外伤患者奠定基础。

Application of three-dimensional fast gradient echo sequence in observation of craniocervical junctional ligament

Objective: To explore the value of three-dimensional fast gradient echo sequence (3DGRE) in observation of the craniocervical junctional ligament. Methods: A total of 21 healthy volunteers underwent 3D-GRE imaging. The imaging data was imported into the post-processing workstation. The structures of the ligaments in the craniocervical junctional area were observed and evaluated by multiplanar reconstruction technique. Results: The features of ligaments in the craniocervical junction were shown clearly for all the 21 cases of volunteers. The scan time was 267-294 s. After the treatment with the three-dimensional reconstruction technique, the signal characteristics and the running structure of the transverse ligament, the alar ligament, the serrated ligament and the lamina could be effectively displayed. Conclusion: The 3D-GRE can evaluate the three-dimensional data of craniocervical junctional ligament in a short period of time. Post-processing reconstruction technique can clearly evaluate the structure characteristics of each ligament, which can lay a foundation for further application in craniocerebral trauma patients.