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Fig 6. Axial source images from a contrast-enhanced MR image obtained immediately after treatment (left image) demonstrate no enhancement about the posterior aspect of a large basilar aneurysm coil mass (arrows). Follow-up imaging performed 6 weeks later (right image) demonstrates the interval development of a thin rim of enhancement marginating the posterior aspect of the coil mass (arrows). This pattern of enhancement is not representative of recanalization but more likely of mural enhancement as a sequela of the in-growth of granulation tissue about the periphery of the coil mass.
