Article Figures & Data
Figures
- Fig 1.
Stent migration with concordance between CE-TR MRA and DSA. A 56-year-old woman with a right cavernous carotid aneurysm. A, Immediate post-PED of the right cavernous ICA aneurysm with stasis. B, DSA shows the actual position of the PED after embolization (yellow line along stent course). C, Complete opacification of the aneurysm at 6-month DSA with no stasis or thrombus. D, DSA confirms distal migration (yellow line along stent course) resulting in reopening of the aneurysm neck (red line with red arrow). Superior demonstration of complete aneurysm opacification (yellow arrow) on CE-TR MRA (F) over 3D-TOF MRA (E) at 6-month follow-up. The hyperintensity in the aneurysm sac on TOF MRA (E) may represent either thrombus from intact PED or aneurysm refilling from PED migration (yellow arrow).
- Fig 2.
Discordance between CE-TR MRA and DSA. A 68-year-old woman with a right paraophthalmic aneurysm. A, Post-Pipeline embolization right paraophthalmic aneurysm. B, No residual neck is demonstrated (yellow arrow) on the 6-month follow-up CE-TR MRA. C, A thin crescentic residual neck measuring 1 mm deep (yellow arrow) is seen on the subsequent DSA.
- Fig 3.
Overestimation of in-stent stenosis on MRA techniques. A 63-year-old woman with a left ophthalmic artery aneurysm. A, 3D-TOF MRA shows complete loss of flow-related enhancement in the PED (yellow arrow), suggestive of occlusion. B, Preserved enhancement within the PED with a narrowed lumen (yellow arrow) suggestive of in-stent stenosis. C, DSA demonstrates a normal-caliber ICA with no in-stent stenosis or occlusion.
Tables
- Table 1:
Quality of visualization of the reconstructed parent artery with the PED using 3D-TOF MRA and CE-TR MRAa
Technique Mean SD 95% CI of Mean Comparison with DSA (P Value) Comparison with TR-MRA (P Value) 3D-TOF MRA 2.62 0.898 2.243–2.936 .0001 .0001 CE-TR MRA 3.81 0.694 3.464–4.162 .344 NA Note:—NA indicates not applicable.
↵a Five-point grading scale from 0–4 (0, very poor; 1, poor; 2, fair; 3, good; 4, excellent). DSA is considered the reference standard with a score of 4.
- Table 2:
Measured luminal diameter of the reconstructed parent artery with the PED using 3D-TOF MRA and CE-TR MRA
Technique Mean (mm) SD 95% CI of Mean Comparison with DSA (P Value) Comparison with TR-MRA (P Value) 3D-TOF MRA 2.108 0.964 1.718–2.497 .0001 .0001 CE-TR MRA 3.137 0.546 2.910–3.351 .661 NA DSA 4.096 0.687 3.819–4.374 NA .661 Note:—NA indicates not applicable.
- Table 3:
Overestimation of luminal stenosis of the reconstructed parent artery with the PED
Technique Mean (mm) (%) SD (%) 95% CI of Mean 3D-TOF MRA versus DSA 1.992 (71.8) 0.998 (52.7) 0.036–3.948 (31.6%–175%) CE-TR MRA versus DSA 0.965 (26.6) 0.497 (12.7) 0.01–1.941 (1.7%–51.5%) 3D-TOF MRA versus CE-TR MRA 1.027 (50.1) 0.776 (58.8) 0.495–2.55 (65.1%–165%)
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