The MR Diagnosis of Giant Intracranial Aneurysms / 实用放射学杂志

ABSTRACT

Objective To analysis the imaging appearances of giant intracranial aneurysms(GIA).Methods Forty pathological proven GIA were included in this study.Results The MR appearances were variable depending on the present of thrombosis,the size and age of the thrombosis,and the secondary changes of the GIA.The typical flow void presented in majority patients.The flow artifacts were displayed across the residual lumen in the phase direction of MR image.The residual lumen showed dense contrast enhancement.The thrombosis was found in 26 GIAs with variable signal intensity from homogeneous hypo-or hyperintensity to onion or turbo like heterogeneous signal intensity without contrast enhancement.DSA studies displayed residual lumen of GIAs and fail to display totally thrombosis GIAs.Conclusion MR studies clearly show the residual lumen and thrombosis of GIAs.MR study is an important conjunctive tool of the DSA studies in diagnosis GIA.