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FIG 4. Wide-neck basilar tip aneurysm treated with assistance from a neck-bridge device.
A, DSA image (Towne projection) after right vertebral artery injection shows the aneurysm before embolization.
B and C, DSA images (Towne projection) obtained 1 year after embolization show subtotal occlusion of the aneurysm. There is only a 2-mm remnant neck (arrow in C), with patency of the left posterior artery.
D, Nonsubstracted DSA image after left vertebral artery injection. The arrow points to the stem marker of the neck-bridge device used during treatment.
E and F, Both 3D TOF (E) and contrast-enhanced 3D TOF (F) images obtained with MIP reconstruction depict the small remnant neck (arrow). Loss of signal intensity is noted at the origin of the posterior cerebral and superior cerebellar arteries surrounding the Trispan coil stem. The addition of contrast material does not improve the quality of the images.
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