Evaluation of angiographic computed tomography in the follow-up after endovascular treatment of cerebral aneurysms—a comparative study with DSA and TOF-MRAReportar como inadecuado




Evaluation of angiographic computed tomography in the follow-up after endovascular treatment of cerebral aneurysms—a comparative study with DSA and TOF-MRA - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

European Radiology

, Volume 19, Issue 2, pp 430–436

First Online: 23 September 2008Received: 07 April 2008Revised: 03 August 2008Accepted: 17 August 2008

Abstract

Following coil embolization of intracranial aneurysms, many centers perform at least one digital subtraction angiography DSA continuing with time-of-flight magnetic resonance angiography TOF-MRA. Angiographic computed tomography ACT provides high-resolution data from a rotational acquisition of a c-arm-mounted flat panel detector. This study evaluates possible advantages of applying ACT in aneurysm follow-up. In 22 patients DSA examinations with a rotational acquisition were performed. Rotational data were processed into an isotropic high-resolution volume. TOF-MRA was performed the day before DSA. Three experienced neuroradiologists performed a rating of the occlusion rate and a subjective method comparison. Weighted κ statistics were calculated to assess the level of interobserver agreement. Compared to DSA, the diagnostic value of ACT as well as of TOF-MRA was rated to be inferior, although the sensitivity of detecting residual necks was higher with both techniques. Compared to TOF-MRA, ACT achieves favorable ratings only in aneurysms after stent-remodeling. Interobserver agreement was high for all techniques. Ratings of the occlusion rate correlated highly between all observers r > 0.85, p < 0.001, respectively. In selected patients ACT can add valuable diagnostic information to DSA. TOF-MRA remains a highly sensitive method for aneurysm follow-up.

KeywordsAneurysm Coiling Follow-up Rotational angiography Angiographic ct Computed tomography MR-angiography  Download fulltext PDF



Autor: Jan-Hendrik Buhk - Kai Kallenberg - Alexander Mohr - Peter Dechent - Michael Knauth

Fuente: https://link.springer.com/







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