An intraluminal medical device system for placement within a neurovascular structure, which comprises, in combination: at least a flexible body; and a porous columnar metallic coating comprising a plurality of independent columnar structures separated from one another by an opening and disposed on at least a portion of the flexible body, wherein the porous columnar metallic coating extends in a substantially normal direction from a surface of at least a portion of the flexible body; flaking of the porous columnar metallic coating being less than 1% of the porous columnar metallic coated surface when the flexible body and porous columnar metallic coating are strained up to 8%; and the combination of the size of the columnar structures of the porous columnar metallic coating and the size of the openings between the columnar structures of the porous columnar metallic coating results in an emissivity in the visible spectrum range of at least 80%; wherein the flexible body partially comprises a radio transparent material and the porous columnar metallic coating on at least a portion of the flexible body comprises tantalum; wherein the porous columnar tantalum coating thickness is between approximately 3 and 10 microns; wherein the porous columnar tantalum coating is applied to the flexible body by a physical vapor deposition process; wherein the physical vapor deposition process includes one of the group of sputtering, cathodic arc deposition or thermal evaporation; and the intraluminal medical device is an embolic coil; further comprising a material in the porous columnar tantalum coating, wherein the material diffuses out overtime. at least a flexible body; and a porous columnar metallic coating comprising a plurality of independent columnar structures separated from one another by an opening and disposed on at least a portion of the flexible body, wherein the porous columnar metallic coating extends in a substantially normal direction from a surface of at least a portion of the flexible body; flaking of the porous columnar metallic coating being less than 1% of the porous columnar metallic coated surface when the flexible body and porous columnar metallic coating are strained up to 8%; and the combination of the size of the columnar structures of the porous columnar metallic coating and the size of the openings between the columnar structures of the porous columnar metallic coating results in an emissivity in the visible spectrum range of at least 80%; wherein the flexible body partially comprises a radio transparent material and the porous columnar metallic coating on at least a portion of the flexible body comprises tantalum; wherein the porous columnar tantalum coating thickness is between approximately 3 and 10 microns; wherein the porous columnar tantalum coating is applied to the flexible body by a physical vapor deposition process; wherein the physical vapor deposition process includes one of the group of sputtering, cathodic arc deposition or thermal evaporation; and the intraluminal medical device is an embolic coil; further comprising a material in the porous columnar tantalum coating, wherein the material diffuses out overtime. <EOS>