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| The correlation study between high-intense vessel sign in cerebral infarction#br#
cerebrovascular stenosis and Willis circle integrity |
1. Department of Radiology, Zhuji People’s Hospital, Zhuji Zhejiang 311800, China;
2. Department of Radiology, Zhejiang Province People’s Hospital, Hangzhou 310014, China |
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Abstract Objective: To evaluate the characteristics of high-intense vessel sign(HVS) on FLAIR in patients with cerebral infarction in middle cerebral artery(MCA). Methods: Patients with acute cerebral infarction in MCA were retrospectively analyzed and were divided into three groups according to time which occurred symptoms to MRI examination. The overall and each group incidence of HVS were analyzed and compared. The correlation between location distribution grade of HVS and vascular stenosis, cerebral infarction form were analyzed by Chi-square test. The differences among three groups were compared. Results: The positive rate of HVS was 81.82%(≤24 hours), 69.35%(2~4 days) and 63.41%(5~7 days) respectively. The incidence rate was descending accompanying the time prolonging. There was no significant difference among three groups. While the incidence rate of HVS was ascending accompanying the vascular stenosis degree arising(P=0.000). HVS appeared in M1 segment trended large part of cerebral infarction, and HVS appeared in the M4~5 segment trended for dispersive cerebral infarction. High positive rate of HVS was occurred more in intermitted group than that in integrity group(χ2=7.089, P=0.008). Conclusion: ①A high positive rate occurred more in acute MCA infarction area in the early stage and that reduced by following time. ②The worse vascular stenosis degree was occurred, the widen distribution and the higher grade of HVS were happened. ③HVS appeared in M1 segment trended large part of cerebral infarction, and HVS appeared in the M4~5 segment trended for dispersive cerebral infarction. ④The entire of Willis circle is one of the most important factor of cerebral infarction. The incidence rate of HVS intermitted group was obviously higher than that in integrity group.
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Received: 17 July 2015
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