磁敏感加权诊断颅内海绵状血管瘤和动静脉畸形价值探讨

目的 研究磁敏感加权成像技术（SWI）在诊断颅内海绵状血管瘤和动静脉畸中的价值。方法 回顾性分析2011年3～8月经手术病理证实的颅内海绵状血管瘤27例和动静脉畸形18例患者的磁敏感加权（SWI）和常规MRI序列（T1WI、T2WI，T1WI增强）图像，分析并比较其影像学特征及不同序列病灶检出率。结果 T1WI、T2WI、T1WI增强、SWI诊断颅内海绵状血管瘤阳性率分别为48．1％、59．3％、70．4％、92．6％，SWI的阳性率明显高于T1WI、T2WI、T1WI增强，差异均有统计学意义（P〈0．05）；常规MRI序列和SWI检出病灶最大径分别为（3．12±1．27）cm和（2．27±0．97）cm，两者比较差异有统计学意义（P〈0．05）；T1WI增强和SWI对病灶检出率相仿（P〉0．05），两者对病灶的检出率明显高于常规T1WI、T2WI，差异有统计学意义（P〈0．05）。结论 磁敏感加权检查对颅内海绵状血管瘤和动静脉畸的检出率明显高于常规MRI序列，值得临床推广。

Discussion susceptibility weighted diagnosis of intracranial cavernous hemangioma and arteriovenous malformations value

Objective To study the value of magnetic susceptibility-weighted in diagnosis of intracranial cavernous hemangioma and arteriovenous abnormal. Methods Susceptibility Weighted Imaging （SWI） and conventional MRI sequences （T1WI, T2WI, enhanced T1WI） images of 27 cases with intracranial cavemous hemangioma and 18 cases with arteriovenous malformation confirmed by pathology were retrospectively analyzed from March to August 2011. The characteristics and the detection rate of different imaging sequence lesion were analyzed and compared. Results The diagnosis rate of T1WI, T2WI, T1 C^＋, SWI in intracranial cavemous hemangioma were 48.1%, 59.3%, 70.4% and 92.6% respectively, the diagnosis rate of SWI was obviously higher than that of T1WI, T2WI, T1 C^＋, the differences were statistically significant （all P 〈 0.05）. The maximum diameter of lesions detected by conventional MRI sequences and SWI were （3.12±1.27） cm and （2.27±0.97） cm respectively, the difference was statistically significant （P 〈 0.05）; lesion detection rate of enhanced T1WI and SWI had no statistically significant difference （P 〉 0.05）, both was obviously higher than that of conventional T1WI and T2WI, the differences were statistically significant （P 〈 0.05）. Conclusion The diagnosis rate of susceptibility weighted in intracranial cavernous hemangioma and arteriovenous abnormal were significantly higher than that of the conventional MRI sequences, and worthy of promotion.