Article Figures & Data
Figures
- Fig 1.
A, Rotational angiogram of a 41-year-old woman with a saccular aneurysm of the left internal carotid artery. B and C, After surgical clipping, IV-ACT multiplanar reformations (B) and 3D volume-rendering IV-ACT reconstructions (C) depict an incomplete occlusion of the aneurysm. D, Lateral IA-DSA series confirm this finding.
- Fig 2.
A, In another example, a middle cerebral artery bifurcation aneurysm was treated with 2 normal-sized clips. B, Coronal IV-ACT maximum intensity projection of the clipped aneurysm with a section thickness of 1 mm delineates a very small aneurysm remnant (black arrow) with a diameter of 1.5 mm. C and D, Again, raters could also detect the aneurysm remnant on anteroposterior IA-DSA images (C, small black arrow) and dual-volume 3D volume-rendering rotational angiography reconstructions (D).
- Fig 3.
Complete occlusion of an unruptured internal carotid artery aneurysm arising from the origin of the left posterior communicating artery. The 71-year-old-man underwent preoperative rotational angiography (A) and postoperative evaluation of the aneurysm with IV-ACT (B and C) and IA-DSA (D). Complete occlusion of the aneurysm and parent vessel patency can be diagnosed on both examinations.
- Fig 4.
A, Typical metal artifacts along the long axis of the clip are delineated in multiplanar reformations of IV-ACT examinations. Note that such artifacts are detected when the long axis of the clip is oriented parallel to the rotational plane of the C-arm. B, In cases in which the long axis of the clip lies perpendicular to the rotational plane, streak artifacts around the blade of the clip are common. C, Multiplanar IV-ACT reformations of the whole brain are adequate for the postoperative diagnosis of a left frontal hygroma—an advantage of IV-ACT compared with IA-DSA. D, Maximum intensity projections of IV-ACT allow the diagnosis of aneurysms on other vascular territories.
