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AJNR - American Journal of Neuroradiology

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Diagnostic Accuracy of 3D Time-of-Flight MR Angiography Compared with Digital Subtraction Angiography for Follow-Up of Coiled Intracranial Aneurysms: Influence of Aneurysm Size

H.A. Deutschmann^a, M. Augustin^a, J. Simbrunner^a, B. Unger^a, H. Schoellnast^a, G.A. Fritz^a and G.E. Klein^a

^a From the Medical University of Graz, Department of Radiology, University of Hospital Graz, Auenbruggerplatz 9, A-8036 Graz, Austria

View larger version (74K): [in this window] [in a new window]   Fig 1. Agreement in detection of residual flow at the neck of an aneurysm of the anterior cerebral artery after treatment with detachable coils seen on DSA (A, black arrow). Unenhanced 3D TOF MRA (B) and MIP reconstruction (C) showing the residual flow (white arrows) in agreement with DSA.

View larger version (79K): [in this window] [in a new window]   Fig 2. Overestimation of a completely occluded aneurysm of the anterior communicating artery seen on DSA (A, black arrow). Unenhanced 3D TOF MR angiography (B) and MIP reconstruction (C) showing a small residual perfusion at the neck of the aneurysm (white arrows).

View larger version (67K): [in this window] [in a new window]   Fig 3. Overestimation of a small residual perfusion of a coiled aneurysm of the middle cerebral artery seen on DSA (A, black arrow). Contrast-enhanced 3D TOF MRA (B) and MIP reconstruction (C) showing a large residual neck (white arrows).

View larger version (73K): [in this window] [in a new window]   Fig 4. Underestimation of a residual perfusion of the neck of a basilaris tip aneurysm seen on DSA (A, black arrow). Contrast-enhanced TOF MRA (B) and MIP reconstruction (C) showing complete occlusion (white arrows).

View larger version (106K): [in this window] [in a new window]   Fig 5. Underestimation of a large residual neck of an aneurysm of the anterior communicating artery seen on DSA (A, black arrow). Unenhanced TOF MRA (B) shows a small residual perfusion of the aneurysm neck (white arrow).