颅底脑膜瘤双期多排螺旋CT血管造影的临床应用

目的:探讨双期注药多排螺旋CT血管造影(MSCTA)对颅底脑膜瘤及其周围组织的显示能力,评价其临床应用价值。材料和方法:收集我院诊治的资料完整的脑膜瘤病人13例,所有病例均行CT平扫和双期注药、一次延迟CT血管造影检查。图像送至SUN工作站进行多平面重建(MultiplannerReconstruction,MPR)、最大密度投影(MaximumIntensityProjection,MIP)、容积再现(VolumeRendering,VR)、表面遮蔽法(ShadedSurfaceDisplay,SSD)后处理观察。结果:13例均为前、中颅凹单发脑膜瘤,重建图像显示瘤体充分强化,willis环血管充盈满意,颅骨、血管、肿瘤三者立体关系显示清楚,主要的征象包括:颈内动脉、大脑前或中动脉被肿瘤包绕,颅骨受侵犯,肿瘤周围组织移位等。结论:双期注药多排螺旋CT血管造影可以充分显示颅底脑膜瘤的影像特征,使颅底血管充分强化,重建后可清楚显示肿瘤、血管及其与邻近组织的关系,有助于脑膜瘤的诊断及治疗方案的制订,评估手术风险,值得在临床推广应用。

Clinical Application of Double-phase Multi-slice Spiral CT Angiography in Skull Base Meningioma

Objective To discuss the clinical application value of double-phase multi-slice spiral CT angiography(MSCT)in skull base meningioma.Methods The examinations of CT plane scanning and double-phase MSCTA were performed in 13 cases with skull base meningioma.All data were analyzed with the software of multiplanner reconstruction(MPR),maximum intensity projection(MIP),volume rendering(VR),shaded surface display(SSD)on the workstation.Result All the lesions were located in the anterior or middle skull base,the tumors and the artery branches of Willis circle were enhanced evidently.The skull,tumor and blood vessels were simultaneously present clearly in MSCTA and the main appearances included the internal carotid artery,anterior or middle cerebral artery were surrounded,the skull bone were involved and the peripheral constructions were deviated from their normal positions.Conclusion MSCTA can show the imaging characters of skull base meningioma and the correlations of tumor,blood vessel and the peripheral constructions,it is useful to diagnose meningioma,choose the treatment programs and evaluate the risk of the operation,which had the important value in clinical application.