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目的探讨磁敏感加权成像(SWI)在脑胶质瘤术前分级中的应用价值。方法回顾性分析低级别(A组,Ⅰ级或Ⅱ级,37例)和高级别(B组,Ⅲ级或Ⅳ级,46例)胶质瘤患者的常规MRI及SWI影像学资料,观察SWI最小密度投影图上的肿瘤内血管结构并进行评分,分析肿瘤内血管结构评分与胶质瘤病理级别的相关性。结果 A组中,11例瘤内磁敏感信号强度(ITSS)血管结构半定量评分为0分,23例为1分,3例为2分;B组中,6例ITSS血管结构半定量评分为2分,40例为3分。B组ITSS血管结构半定量评分高于A组(Z=-8.019,P<0.01)。ITSS血管结构半定量评分与病理级别呈正相关(r_s=0.948,P<0.01)。结论分析SWI有助于术前对脑胶质瘤进行分级评判。
Objective To investigate the value of magnetic susceptibility weighted imaging (SWI) in preoperative grading of glioma. Methods The MRI and SWI imaging data of patients with gliomas in low grade (group A, grade Ⅰ or Ⅱ, 37 cases) and high grade (group B, Ⅲ or Ⅳ, grade 46) were retrospectively analyzed. SWI The tumor structure of the tumor on the minimum density projection map was scored and the correlation between intravascular tumor score and pathological grade of glioma was analyzed. Results In group A, the semi-quantitative score of ITSS vascular structure was 0 in 0, 23 in 1 and 3 in 2, and in group B, the semi-quantitative score of ITSS in 6 patients was 2 points, 40 cases for 3 points. The semi-quantitative score of ITSS vascular structure in group B was higher than that in group A (Z = -8.019, P <0.01). Semiquantitative score of ITSS vascular structure was positively correlated with pathological grade (r_s = 0.948, P <0.01). Conclusion The analysis of SWI is helpful for the grading of glioma before surgery.