Article Figures & Data
Figures
- Fig 1.
Temporal distribution of aneurysmal contrast enhancement analyzed in the days since endovascular treatment.
- Fig 2.
Anterior communicating artery aneurysm after endovascular treatment. Axial nonenhanced (left) and contrast-enhanced (right) black-blood MR images show enhancement of the sidewall and inside the aneurysm sac.
- Fig 3.
Tip of a basilar artery aneurysm after endovascular treatment. Axial nonenhanced (left) and contrast-enhanced (right) black-blood MR images show contrast enhancement of the sidewall and inside the aneurysm sac.
- Fig 4.
Anterior communicating artery aneurysm after endovascular treatment. Axial TOF-MRA (left) and axial nonenhanced (middle) and contrast-enhanced (right) black-blood MR images show recurrence at the base of the aneurysm. The same aneurysm shows contrast enhancement inside the aneurysm sac.
Tables
2D T1WI TIRM Black-Blood 3D T1WI SPACE Black-Blood 3D T1WI CS-SPACE Black-Blood Section orientation Axial and coronal Sagittal Sagittal TR, TE, TI (ms), FA, NEX, PAT 2000, 11, 1200, 150°, 2, GRAPPA 2 710, 11, N/A, N/A, 1, GRAPPA 2. echo train length 157 ms 800, 10, N/A, N/A, 1, GRAPPA 2. echo train length 269 ms FOV 230 × 201 mm 230 × 230 mm 225 × 225 mm Matrix 512 × 410 256 × 265 448 × 448 Section thickness 2 mm (10% gap) 0.9 mm 0.64 mm Spatial resolution 0.45 × 0.45 × 2 mm 0.9 mm (isotropic) 0.5 × 0.5 × 0.64 mm No. of slices 15 192 256 Scan time 4 min 6 sec 6 min 48 sec 6 min 54 sec Note:—FA indicates flip angle; TRIM, turbo inversion recovery magnitude; CS-SSPACE, sampling perfection with application-optimized contrasts by using different flip angle evolutions using compressed sensing; GRAPPA, generalized autocalibrating partially parallel acquisition; PAT, parallel acquisition technique.
Median Range Interquartile Range Age (yr) 54 33–77 47–61 Days since treatment 417 87–5318 189–1273 Aneurysm diameter (cm) 7 3–20 5–10 Aneurysm Location Frequency Percentage Basilar artery, tip 4 12.9% Anterior cerebral artery, A1 segment 1 3.2% Anterior communicating artery 12 38.7% Internal carotid artery, paraophthalmic 2 6.5% Internal carotid artery, terminus 1 3.2% Anterior choroidal artery 2 6.5% Vertebral artery 2 6.5% Posterior communicating artery 7 22.6% Contrast Enhancement Aneurysm Recurrence Yes No Total Yes 16 2 18 No 8 4 12 Total 24 6 30 - Table 5:
Aneurysm enhancement location and grade in 24/31 aneurysms showing any enhancement
Case No. Aneurysm Location Location of Contrast Enhancement Grading of Contrast Enhancement 1 AcomA Inside the aneurysm Moderate 2 Wall/sidewall Strong 3 Vertebral artery Inside the aneurysm Strong 4 Wall/sidewall Strong 5 Vertebral artery Inside the aneurysm Faint 6 Wall/sidewall Faint 7 PcomA Base Faint 8 Basilar tip Wall/sidewall Strong 9 Carotid bifurcation Inside the aneurysm Faint 10 Paraophthalmic aneurysm Inside the aneurysm Faint 11 AcomA Inside the aneurysm Strong 12 AcomA Base Strong 13 Inside the aneurysm Strong 14 Wall/sidewall Strong 15 A1 segment Base Strong 16 AcomA Base Moderate 17 Anterior choroidal artery Base Strong 18 PcomA Inside the aneurysm Strong 19 PcomA Inside the aneurysm Faint 20 Paraophthalmic aneurysm Inside the aneurysm Moderate 21 PcomA Inside the aneurysm Faint 22 Basilar tip Inside the aneurysm Faint 23 Basilar tip Base Moderate 24 PcomA Inside the aneurysm Strong 25 AcomA Inside the aneurysm Strong 26 Wall/sidewall Strong 27 PcomA Inside the aneurysm Strong 28 Wall/sidewall Strong 29 AcomA Inside the aneurysm Faint 30 AcomA Inside the aneurysm Faint 31 AcomA Dome Moderate Note:—AcomA indicates anterior communicating artery; PcomA, posterior communicating artery.
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