Abstract: A method of processing seismic data by a reflection seismic survey includes: calculating a first pseudo-water-surface reflection wave by virtually propagating a direct wave represented in the seismic data in a progressing direction of a time axis by a time in which the acoustic wave propagates in the water at a distance twice a depth of the seismic source, and further correcting an amplitude of the direct wave so that the amplitude is approximated to an amplitude of a water-surface reflection wave of the acoustic wave represented is the seismic data; and subtracting a component corresponding to the first pseudo-water-surface reflection wave from the seismic data.

Abstract: A vascular embolization device includes a coil with a primary shape and an stretch resistant wire provided inside the coil, in which the stretch resistant wire is a multilayer strand including at least one core layer and at least one outer layer including one or more resin compositions and a biochemical active material, and the core layer is composed of a material with a tensile break strength higher than that of the outer layer. The vascular embolization device has the function of administering a biochemical active material and also has good flexibility.

Abstract: A vascular embolization device includes a coil with a primary shape and an stretch resistant wire provided inside the coil, in which the stretch resistant wire is a multilayer strand including at least one core layer and at least one outer layer including one or more resin compositions and a biochemical active material, and the core layer is composed of a material with a tensile break strength higher than that of the outer layer. The vascular embolization device has the function of administering a biochemical active material and also has good flexibility.

Abstract: A vascular embolization device having the function of administering a biochemical active material and also having high flexibility is provided. Specifically, the vascular embolization device includes a coil and a biochemical active material-containing resin wire inserted in the inside of the coil, in which the resin wire is a multilayer strand including a core and at least one outer layer, and the core and the at least one outer layer individually include resin compositions with solubilities different from each other in the same organic solvent.

Abstract: A cylindrical stent cover covering a cylindrical stent body wherein open at both ends and longitudinally elongates between the both open ends having an inner side surface and an outer side surface, said stent cover covers the inner side surface and/or outer side surface of said stent body, said stent cover comprise a central part made of a nonporous film and the both ends made of a porous film. When the stent cover use as cover of stent body placed in body duct like the vessel, it provides that maintains lumen in a state of patency over a long period of time and has an effect of preventing restenosis.

Abstract: A catheter balloon made of a polymer and comprising a cylindrical portion of a substantially uniform diameter, tapered portions at the front and rear of the cylindrical portion and connecting portions at the front and rear of the tapered portions, wherein the wall thicknesses (B) of the middle parts of the tapered portions are equal to or smaller than 1.2 times the wall thickness (A) of the cylindrical portion (B/A.ltoreq.1.2), and the wall thickness of the front tapered portion is less than the wall thickness of the rear tapered portion.