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Fig 2. Follow-up investigations after 4 weeks.
A, Bicarotid trunk angiogram obtained 4 weeks after embolization reveals bilateral complete aneurysm occlusion with preserved parent artery patency.
B, Volume-rendered reconstruction of 16-row multisection CT angiogram (MSCTA). The polymer-filled aneurysms do not produce beam-hardening artifacts, so that morphology of the parent artery and that of the polymer cast could be evaluated concomitantly, frequently confirming angiographic findings.
C, Maximum intensity projection (MIP) of MSCTA displaying exclusively the right carotid artery for closer vessel evaluation. Note the separation between the cast and the carotid artery on axial sections suggesting the formation of a neointima layer (arrow, upper left hand corner).
D, Right carotid artery angiogram confirms MSCTA findings, but demonstrates this soft tissue interposition more clearly (arrow).
E, Axial gadolinium-enhanced T1-weighted 3D fast-spoiled gradient-echo imaging (FSPGR) allows for a detailed evaluation of the configuration of the polymer cast, demonstrating a smooth reconstruction of the arterial vessel wall (arrow).
F, 3D time-of-flight MR angiography shows preserved carotid artery patency; no intra-aneurysmal flow signals were observed.
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