三维快速成像稳态采集序列在中脑导水管狭窄诊断中的应用

目的评价三维快速成像稳态采集（3D—FIESTA）序列诊断非肿瘤性中脑导水管狭窄的应用价值。方法48例中脑导水管狭窄患者同时行常规自旋回波（SE）序列及3D—FIESTA序列扫描，并对中脑导水管的成像效果进行比较。结果SE显示导水管狭窄率为79％（38／48），3D—FIESTA显示导水管狭窄病变率为98％（47／48）；3D-FIESTA序列对中脑导水管狭窄显示效果有明显优越性，其组间比较，差异有统计学意义（P〈0．01）。结论3D-FIESTA序列结合多平面重建技术能清晰显示中脑导水管狭窄，可作为一种非肿瘤性梗阻性脑积水成像的新方法。

Application of 3D-FlESTA Sequence in the Diagnosis of the Stenosis of Midbrain Aqueduct

Objective To explore the evaluation of three-dimensional fast imaging employing steady-state acquisition(3D-FIESTA) sequence in the diagnosis of non-tumorous midbrain aqueduct stenosis.Methods 48 patients with non-tumorous midbrain aqueduct stenosis were performed by conventional SE sequence and 3D-FIESTA sequence on a 1.5T superconductive MR unit.Then the advantage on showing aqueduct of midbrain foramen was retrospectively analyzed.Results The detecting rate of midbrain aqueduct stenosis was 98% (47/48) on 3D-FIESTA sequence and 79% (38/48) on conventional SE sequence,3D-FIESTA was more advanced on showing the aqueduct of midbrain(P <0.01).Conclusion The combination of 3D-FIESTA with MPR can clearly show the midbrain aqueduct stenosis,and be a new MRI examination way of obstructive hydrocephalus.