Abstract：Objective To explore the predictive value of"dot sign"formed by contrast agents extravasation during delayed contrast-enhanced CT scan on expansion of intracranial hematoma at an early stage.Methods Thirty patientswith acute and spontaneous intracerebral hemorrhage within 6 hours accepted the detection in their own will in our hospital from January 2013 to December 2015 were selected and provided with baseline CT scan，delayed contrast-enhanced CT scan and CT scan for reexamination after 24 hours.According to outcomes of"dot sign"，patientswere divided into positive"dot sign"group and negative"dot sign"group.Results There were 13 and 17 cases in positive"dot sign"group and negative"dot sign"group respectively.The positive and negative predictive value was 76.9%and 94.2%respectively.Conclusion"Dot sign"formed by contrast agents extravasation during delayed contrast-enhanced CT scan can effectively predict the expansion of intracranial hematoma atan early stage.
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