Abstract：Objective To explore the clinical value of T2 star weighted angiography (SWAN) sequence in the diagnosis of cerebral venous malformation (CVM). Methods The MRI data of 15 patients with CVM were retrospectively analyzed. The patients were all examined by conventional scan, SWAN and enhanced scan. Results Among 15 cases of CVMs, 11 cases were located in supra tentorium, 4 cases were located in infra tentorium. MRI showed the draining veins demonstrated hypointensity on T1WI and hyperintensity on T2WI in 12 cases and in the other 3 cases, the draining veins demonstrated hypointensity on T1WI and hypointensity on T2WI; and all medullary veins demonstrated hypointensity on T1WI and hypointensity on T2WI. Both draining veins and medullary veins were clearly shown as hyperintensity on SWAN with the typical “Caput Medusas” characteristic. Multiple medullary veins converged into drain veins were shown in enhanced scan. Conclusion Comparing with conventional and enhanced MRI, SWAN could display the features of CVM more clearly and sensitively, which indicates that SWAN could be used as a routine sequence in diagnosing CVM.
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