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. 2010 Jul 19;16(2):133–137. doi: 10.1177/159101991001600204

Figure 1.

Figure 1

The O'Kelly-Marotta (OKM) grading scale for assessment of aneurysms treated by flow diversion. Each aneurysm is assigned a grade according to the initial degree of filling (A,B,C,D) and the degree of stasis (1,2,3) observed through the angiographic phases (arterial, capillary, venous).