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目的：探讨颅内静脉血管瘤的ＭＲＩ和ＭＲＡ影像学表现及诊断和鉴别诊断。材料和方法：应用ＳｉｅｍｅｎｓＭｅｇｎｅｔｉｏｎＶｉｓｉｏｎ１．５Ｔ超导系统对诊断静脉血管瘤（ＶＡ）２０例进行分析。ＭＲＩ扫描用ＳＥＴ１和ＴｕｒｂｏＳＥＴ２加权序列。ＭＲＡ采用ｔｏｆ－ｔｉ３Ｄ－ｍｕｌｔｉ－ｓｌａｂ－ｔｒａ－ｔｕｎ序列。１６例作增强Ｔ１加权及ＭＲＡ检查。血管重建采用ＭＩＰ技术。有１１例曾行ＣＴ检查，１例行手术治疗。结果：所有病例均由ＭＲ检查作出首诊。Ｔ１加权１８例显示扩张引流静脉呈点条状低信号影，有２例未显示，经增强后显示，并有部分髓静脉显示。Ｔ２加权引流静脉多呈高信号，个别呈低信号。较大的ＶＡ亦可显示髓质静脉。ＭＲＡ１５例显示异常血管，典型的表现为脑实质内见为数不等的髓质静脉呈伞状汇入一根异常扩张的引流静脉，整个形态似“水母头”。１例ＭＲＡ未显示病灶。结论：ＭＲ是诊断ＶＡ最好的影像方法，ＭＲＡ有助于确诊本病。增强ＭＲＩ及ＭＲＡ可提高ＶＡ的检出率
Objective: To investigate the MRI and MRA features of intracranial venous hemangiomas and their diagnostic and differential diagnosis. Materials and Methods: The diagnosis of venous hemangioma (VA) was performed using SiemensMeg netionVision 1.5T superconducting system in 20 cases. MRI scans with SET1 and TurboSET2 weighted sequences. MRA uses the tof-ti3D-multi-slab-tra-tun sequence. 16 cases of enhanced T1 weighted MRA examination. Vascular reconstruction using MIP technology. There are 11 cases had CT examination, 1 case of surgical treatment. Results: All cases were diagnosed by MR examination. T1 weighted 18 cases showed dilated dilated veins showed a strip of low signal shadow, 2 cases did not show enhanced after the show, and some of the medullary veins showed. T2-weighted veins mostly high signal, individual showed low signal. Larger VA also shows medulla veins. MRA15 cases showed abnormal blood vessels, the typical manifestations of intraparenchymal medulla many unequal medulla veins umbrella into an abnormal dilatation of the drainage veins, the entire form resembles “jellyfish head.” 1 case of MRA did not show lesions. Conclusion: MR is the best imaging method for diagnosing VA. MRA can help diagnose the disease. Enhanced MRI and MRA can increase the detection rate of VA