Application of dual energy brain CT plane scanning in diagnosis of intracranial hemorrhage after endovascular treatment / 中华老年心脑血管病杂志

ABSTRACT

Objective To assess the accuracy of dual energy brain CT plane scanning in diagnosis of intracranial hemorrhage (ICH) and contrast medium extravasation in acute ischemic stroke (AIS) patients after endovascular treatment.Methods Twenty AIS patients underwent dual energy brain CT scanning immediately after endovascular treatment.The 140 kV and 80 kV single energy data were input into the working station.The accuracy and specificity of dual energy brain CT plane scanning in diagnosis of ICH and contrast medium extravasation were assessed according to the virtual unenhanced non-contrast (VNC) images and iodine overlay maps (IOM) combined with clinical and vonventional brain CT or MRI after 48 h.Results Of the 20 patients included in this study,6 had no high density foci and 14 had 27 high density foci in brain parenchyma and subarachnoid cavity on 140 kV single energy CT images.Of the 27 high density foci in brain parenchyma and subarachnoid cavity,8 with a consistency of VNC and IOM were diagnosed as ICH.Brain CT plane scanning demonstrated hemorrhage in 7 out of the 8 high density foci.IOM showed high density foci and VNC showed no high density foci in 19 patients which were diagnosed as contrast medium extravasation.The sensitivity,specificity,positive and negative prediction value of dual energy brain CT plane scanning in diagnosis of ICH and contrast extravasation were 100.0％,95.0％,87.5 ％,and 100.0％ respecttively.Conclusion Dual energy brain CT plane scanning can rapidly and accurately identify ICH.