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Fig 2. A, Wide-necked aneurysm filled with colored silicon and coil. Two-micron-thick section preparations (numbered 1–6) were studied via transillumination. B, Enlargement of section 4 (coils, white arrow; colored silicon, black arrow). C, For example, at the level of filling 50%–60%, blue, green, and black silicon were injected (compare Table 2). We then darkened those colors and denoted the open space with gray. At this filling level, the aneurysmal residue on the reference was rated "residual aneurysm" according to the Jean Raymond grading scale.
