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目的探讨磁敏感加权成像(SWI)序列对轻型脑外伤患者的诊断价值。方法 45例轻型脑外伤患者,伤后分别行头部CT、常规磁共振成像(MRI)及SWI检查,并对MRI常规序列和SWI检查出的脑微出血例数,及有无昏迷患者SWI检查脑微出血的阳性率进行对比分析。结果 SWI对脑外伤微出血灶检查的阳性率明显高于CT及MRI常规序列扫描,差异有统计学意义(P<0.05);SWI对伤后出现短暂性昏迷病史的患者SWI的检出阳性率为93.3%(28/30),伤后无短暂性昏迷病史的患者SWI的检出阳性率为66.7%(10/15);昏迷患者SWI阳性病灶的检出率要显著高于非昏迷患者,差异有统计学意义(χ2=3.8891,P<0.05)。结论 SWI比CT及常规MRI对轻型脑外伤患者脑内微出血灶的检出有更高的准确率,对指导临床治疗及判断预后有重大意义。
Objective To investigate the diagnostic value of magnetic susceptibility weighted imaging (SWI) in patients with light traumatic brain injury. Methods Forty-five patients with mild traumatic brain injury underwent head CT, routine MRI and SWI after the injury. The number of cerebral micro-hemorrhage detected by routine MRI and SWI and the SWI in patients with or without coma Cerebral hemorrhage positive rate comparative analysis. Results The positive rate of SWI in detecting micro-hemorrhage of traumatic brain injury was significantly higher than that of conventional CT and MRI scan (P <0.05). The positive rate of SWI in patients with transient coma after SWI Was 93.3% (28/30). The positive rate of SWI was 66.7% (10/15) in patients without a history of transient coma after injury. The detection rate of SWI-positive lesions was significantly higher in patients with coma than in non-coma patients, The difference was statistically significant (χ2 = 3.8891, P <0.05). Conclusion Compared with CT and conventional MRI, SWI has a higher accuracy in detection of intracerebral micro-hemorrhage in patients with mild traumatic brain injury, which is of great significance in guiding clinical treatment and prognosis.