Systems and methods for treating aneurysms

An apparatus for treating an aneurysm in a blood vessel, comprising:

• an occlusion element configured to be releasably coupled to an elongate delivery shaft and configured to be delivered in a collapsed configuration through an inner lumen of a delivery catheter, the occlusion element comprising an inverted mesh tube having an outer layer and an inner layer, the outer layer transitioning to the inner layer at an inversion fold, wherein at least the outer layer is formed into a first expanded shape comprising:
• a smooth outer cylinder configured to engage a wall of an aneurysm throughout a 360° circumference;
• and
• a substantially distal-facing surface comprising a plurality of heat-formed three-dimensional surface contours, the plurality of surface contours including at least a first contour comprising a convex peak and second contour comprising a concave peak, the second contour adjacent the first contour, wherein the first and second contours are together configured to apply a radial bias with the outer cylinder.