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(cont'd) H–K, Gray-scale–reversed MR DSA images of H, I, J, and K correspond to source images of D, E, F, and G, respectively. Demonstration of each component of the AVM was graded as excellent (feeder = 3, nidus = 3, drainer = 3). Note the carotid siphon remains visible when major veins and dural sinuses are shown (K)
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