Article Figures & Data
Figures
- Fig 1.
ivACT (A) and intra-arterial 3D-DSA (B) show, in comparable image quality, complete occlusion after coiling of a posterior communicating artery aneurysm. 2D-DSA (C) confirms complete aneurysm occlusion. TOF-MRA (D) demonstrates complete occlusion.
- Fig 2.
ivACT (A) and intra-arterial 3D-DSA (B) show, in a comparable way, complete occlusion of an anterior communicating artery aneurysm after coiling. MRA reveals no remnant (C). In addition, a second aneurysm located at the tip of the basilar artery was treated by coil embolization. ivACT (D) and 3D-DSA (E) demonstrate, in nearly identical quality, complete aneurysm occlusion with only mild irregularity at the aneurysm base. In addition, MRA reveals no remnant (F). As an advantage of ivACT (G) and MRA (H), aneurysm evaluation can be performed with only 1 examination step, in contrast to DSA, requiring several vessel catheterizations and contrast material injections.
- Fig 3.
ivACT (A) and 3D-DSA (B) reveal a small remnant after coiling of a posterior inferior cerebellar artery aneurysm in nearly identical quality. DSA confirms this finding (C). TOF-MRA also detects the small remnant (D).
- Fig 4.
Native (A) and DSA images (B) after stent-assisted coil embolization of a basilar artery tip aneurysm show a small, laterally located remnant. In ivACT (C) and intra-arterial rotational 3D-DSA (D), the remnant can be revealed reliably in nearly identical image quality. In TOF-MRA (E), the remnant can be delineated clearly, but in contrast to ivACT and 3D-DSA, artifacts are induced by the implanted stent, making stent assessment impossible. In contrast, ivACT allows precise assessment of the stent lumen.
- Fig 5.
Native (A) and contrast-enhanced 2D-DSA (B) images show complete occlusion of a posterior communicating artery aneurysm, treated initially by subtotal clipping, followed by stent-assisted coil embolization. ivACT (C) and 3D-DSA (D) illustrate complete aneurysm occlusion in a comparable quality. In ivACT, no compromising artifacts by the metal implants are observed. MRA fails in delineating the coiled aneurysm because of severe susceptibility artifacts (E).
Tables
Mean size and SD of aneurysm remnants measured by ivACT and TOF-MRA in correlation with DSA
Remnant DSA (Mean) (SD) ivACT (Mean) (SD) Pearson Correlation Coefficient TOF-MRA (Mean) (SD) Pearson Correlation Coefficient Height 3.1 mm (±1.7) 2.9 mm (±1.8) 0.963 (P < .001) 2.8 mm (±1.9) 0.925 (P < .001) Width 3.1 mm (±2.0) 3.1 mm (±2.6) 0.930 (P < 0.001) 2.8 mm (±2.1) 0.941 (P < .001)
