3D Computerized Occlusion Rating of Embolized Experimental Aneurysms Using Noninvasive 1.5T MR Imaging

Abstract

BACKGROUND AND PURPOSE:For embolized cerebral aneurysms, the initial occlusion rate is the most powerful parameter to predict aneurysm rerupture and recanalization. However, the occlusion rate is only estimated subjectively in clinical routine. To minimize subjective bias, computer occlusion-rating (COR) was successfully validated for 2D images. To minimize the remaining inaccuracy of 2D-COR, COR was applied to 1.5T 3D MR imaging.

Computerized Angiographic Occlusion Rating for Ruptured Clipped Aneurysms is Superior to Subjective Occlusion Rating

“…We fully agree that oblique projections allow better assessment of aneurysm necks; the superiority of COR over SOR also improves the assessment of oblique comparative angiographic studies, as previously reported. 20 In the future, COR can be used for 3D angiography of cerebral aneurysms, thus allowing not only increased precision of assessment but eventually also a volumetric quantification of aneurysm necks. A supplementary work by using 3D COR, which may elucidate this aspect, is in progress and will be reported.…”