Article Figures & Data
Figures
- Fig 1.
Stent placement in an extracranial carotid stenosis.
A, 85% stenosis of the ICA.
B, 6–8 × 40-mm stent (Acculink; Guidant Corporation) is placed.
C, Native image immediately after stenting shows a significant residual stenosis (arrow) requiring postdilation.
D, Satisfactory result and remaining minor narrowing (arrow).
E andF MPRs, Lateral (E) and coronal (F) ACT views (5-mm sections) provide superior visualization of the entire stent, its struts, and the remaining narrowing (arrow) and show the underlying, heavily calcified plaque (arrowheads) responsible for incomplete stent deployment.
G andH, Reducing the section thickness to 0.1 mm allows visualization along a cut plane through the center of the stent, showing the effective remaining narrowing (arrow).
I andJ, On axial views, the different diameters of the recanalized lumen distal to and at the level of the plaque are appreciated. They further reveal the circumferential narrowing by the calcified plaque (arrowheads in J). Note visualization of soft-tissue components in the neck.
- Fig 2.
Stent placement in an 80% stenosis of the intracranial middle cerebral artery.
A, High-grade stenosis (arrow) of the left M1 segment
B, Treatment with a 3 × 8-mm drug-eluting stent (Cypher; Cordis) was successful, completely reestablishing the lumen.
C andD, Nonsubtracted images permit moderate visualization of the deployed stent (arrows).
E andF, Coronal and axial MPRs allow superior visualization of the stent (arrows).
G andH, Orthogonal views (“down the barrel”) through the inner lumen of the stent at its proximal and distal ends show complete and symmetric deployment.
- Fig 3.
Stent placement in a basilar artery stenosis.
A andB, 70% stenosis (arrow) of the midbasilar artery, with poststenotic dilatation.
C andD, Good result after stenting and dilatation. The stent (arrows) was postdilated to better oppose the distal portion to the larger lumen of the basilar artery.
E andF, Nonsubtracted images insufficiently show the stent (arrows). The degree of deployment over its entire length cannot be appreciated with certainty.
G–J, MPRs obtained immediately after stenting (stenting thickness, .1 mm) reveal the asymmetric deployment of the stent with a remaining waist (arrow). Orthogonal projections (I–J) demonstrate the change in caliber (arrows) and show the larger lumen stent distally (J).
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