中脑导水管狭窄:3D-CISS序列的应用

目的：探讨3D－CISS序列（Three-Dimensional constructive inference in steady state)在非肿瘤性中脑导水管狭窄的临床应用价值。资料与方法：对本组34例在1．5T在1．5T超导MR仪和头颅线圈内行常规SE序列及3D－CISS序列扫描，通过对3D－CISS原始图像及MPR多平面重建图像来观察中脑导水管结构。对上述两种序列的图像显示结构进行对比分析。结果：3D－CISS显示导水管狭窄病变为97．06％（33／34），常规SE显示导水管狭窄为79．41％（27／34）。二者在显示病变方面有显著差异（P＜0．05）。结论：3D－CISS序列结合多平面重建技术在显示中脑导水管狭窄方面更敏感，辅助动态播放可观察脑脊液的异常流动，为临床确诊和治疗提供了可靠依据。

Evaluation of 3D-CISS Sequence in the Diagnosis of the Stenosis of Midbrain Aqueduct

Objective To evaluate three-dimensional constructive inference in steady state (3D-CISS) sequence in the diagnosis of non-tumorous midbrain aqueduct stenosis.Materials and Methods Conventional SE sequence and 3D-CISS sequence were performed in 34 cases on a 1.5T superconductive MR unit. The midbrain aqueduct was observed on both 3D-CISS and MPR images, and the results were compared and analyzed.Results The detecting rate of midbrain aqueduct stenosis was 79.41% (27/34) on conventional SE images and 97.06% (33/34) on 3D-CISS images. The difference between the two groups was statistically significant (P<0.05).Conclusion A combination of 3D-CISS with MPR can display midbrain aqueduct stenosis more easily, providing useful information for clinical diagnosis and management.