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目的探讨颅内神经鞘瘤与脑膜瘤的磁敏感加权成像(SWI)表现,从肿瘤内微出血的角度评估SWI区分神经鞘瘤与脑膜瘤的价值。方法 2008年至2011年于本院手术,经病理证实的42例神经鞘瘤与31例脑膜瘤患者入组,患者术前均行常规磁共振扫描及SWI。评估并比较二者肿瘤内磁敏感性低信号(ITSHIA)发生率及IT-SHIA频数评分的差异。结果神经鞘瘤瘤体内ITSHIA的发生率明显高于脑膜瘤(χ2=40.958,P=0.000)。神经鞘瘤瘤内ITSHIA的半定量评分明显高于脑膜瘤(Zc=6.088,P=0.000)。结论 SWI能够评估肿瘤内部结构和病理特征。由于微出血及其代谢产物的敏感性使SWI成为鉴别诊断神经鞘瘤与脑膜瘤的有效序列。在除外钙化的情况下,该序列可作为常规序列的补充。
Objective To investigate the performance of magnetic resonance weighted imaging (SWI) of intracranial schwannoma and meningioma, and to evaluate the value of SWI in distinguishing schwannoma from meningioma from the perspective of intracranial hemorrhage. Methods Forty-two patients with neurilemmoma and 31 patients with meningioma who were surgically treated in our hospital from 2008 to 2011 were enrolled. All patients underwent routine MRI and SWI. Evaluate and compare the incidence of tumor-specific low-sensitivity magnetic resonance (ITSHIA) and IT-SHIA frequency scores. Results The incidence of ITSHIA in schwannomas was significantly higher than that in meningiomas (χ2 = 40.958, P = 0.000). Semiquantitative scores of ITSHIA in schwannomas were significantly higher than those in meningiomas (Zc = 6.088, P = 0.000). Conclusion SWI can assess the internal structure and pathological features of tumors. Due to the sensitivity of micro-hemorrhage and its metabolites, SWI has become a valid differential in the diagnosis of schwannoma and meningioma. With the exception of calcification, this sequence may serve as a complement to conventional sequences.