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AJNR - American Journal of Neuroradiology

Published ahead of print on September 20, 2007
doi: 10.3174/ajnr.A0633

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Single-Institution Experience with Matrix Coils in the Treatment of Intracranial Aneurysms: Comparison with Same-Center Outcomes with the Use of Platinum Coils

D.J. Rivet^a,b,c, C.J. Moran^a,b, A. Mazumdar^a, T.K. Pilgram^a, C.P. Derdeyn^a,b and D.T. Cross^a,b

^a Neuroradiology Section, Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, Mo
^b Department of Neurological Surgery, Washington University in St. Louis, St. Louis, Mo
^c Department of Neurosurgery, Naval Medical Center Portsmouth, Portsmouth, Va

View larger version (20K): [in this window] [in a new window]   Fig 1. Aneurysm outcome grading scheme. A, Grade 1 "Obliterated" aneurysms had no contrast filling within the interstices of the coils or at the neck and were considered completely obliterated. B, Grade 2 "Neck Remnant" was used to classify cases with contrast filling at the base of the aneurysm within the neck or within an area subjacent to the main coil mass, but not at the actual neck. C, Grade 3 "Residual" or "Recurrent" was used if there was contrast filling within the interstices of the coil, or more contrast filling than simply at the neck, because of expansion of the aneurysm or compaction of the coil, depending on whether it was present immediately after the treatment ("Residual") or at follow-up ("Recurrent").