CT血管造影后颅内造影剂外渗的影像学分析

Imaging analysis of intracranial contrast extravasation after CT angiography

目的探讨头颈部CT血管造影(CTA)后颅内造影剂外渗的影像学表现。方法分析浙江省嘉兴市中医医院3例头颈部CTA后颅内造影剂外渗影像表现并复习相关文献。结果3例颅内造影剂外渗CT表现为基底核团或背侧丘脑处可见团片状或小片状稍高密度影,边界清楚,周围无水肿带,无占位效应,CT值均小于90Hu。其中1例MRI证实高密度发生区位于梗死灶内。结论头颈部CTA后颅内造影剂外渗有典型的影像表现,原梗死灶内出现斑片状高密度影,无占位效应和水肿带,4-24小时内复查高密度影吸收是头颈部CTA后颅内造影剂外渗的典型影像学表现,可为后期治疗提供相应依据。

Objective To investigate the imaging findings of intracranial contrast extravasation after head and neck CT angiography(CTA).Methods The images of intracranial contrast extravasation after CTA of head and neck were reviewed.Results Three intracranial contrast extravasation CT showed small patch or small patch at the basal nucleolus or dorsal thalamus,clear boundary,no surrounding edema zone,no occupying effect,and CT value was less than 90HU.One of these cases,MRI confirmed that the high density occurrence zone was within the infarct.Conclusion Intracranial contrast extravasation after head and neck CTA has typical imaging manifestations,with patchy high-density shadow,no space occupying effect and edema zone.Review of high-density shadow absorption within 4 to 24 hours is a typical imaging manifestation of intracranial contrast extravasation after head and neck CTA,which can provide corresponding basis for later treatment.