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A, DSA image (anteroposterior view). B, 3D image showing the aneurysm (arrow). C, DSA in the same angulation as the 3D image. D, 3D image, with the white line indicating the conventional concept of the aneurysmal neck and the black line indicating the aneurysmal neck considered by us, to allow a coil bulge so as to reconstruct the bifurcation. E, Angiogram before coil detachment shows a well-placed coil with the microcatheter tip outside the aneurysm. F, Angiogram after coil detachment.
