Abstract: A stent system according to the present invention is for use in retrieving a blood clot from the brain region and includes a wire; a first stent connected to a distal portion of the wire; a first outer sheath that covers and is fixed to a portion of the wire proximal to the first stent; and a second stent disposed on a portion of the wire proximal to the first stent, in which the second stent is configured to be movable toward or away from the first stent.

Abstract: A stent according to the invention includes: a strut extending in a predetermined direction; a first protrusion provided on the strut, the first protrusion being substantially L-shaped and extending in a direction away from the strut and in a direction toward a distal side in the predetermined direction; a second protrusion that is provided on the strut and located distal to the first protrusion, the second protrusion being substantially L-shaped, extending in a direction away from the strut and in a direction toward a proximal side in the predetermined direction, and having a tip spaced apart from a tip of the first protrusion; and an opaque member being substantially tubular and highly opaque to radiation, the opaque member having two end portions in which the first and second protrusions are inserted, respectively.

Abstract: An imaging system such as a medical C-arm x-ray fluoroscopy machine includes a tracking system that tracks a position of an x-ray source and an x-ray detector using sensors which monitor positions of joints which allow relative motions of segments in a support for the x-ray source and detector. Sensor readings are used in a kinematic chain. One or more segments that behave in a non-rigid manner are replaced by a virtual rigid link in the kinematic chain that takes into account deformations of the segments (e.g. under the influence of gravity). Calibration methods permit calibration of the system using images of phantoms.

Abstract: An imaging system such as a medical C-arm x-ray fluoroscopy machine includes a tracking system that tracks a position of an x-ray source and an x-ray detector using sensors which monitor positions of joints which allow relative motions of segments in a support for the x-ray source and detector. Sensor readings are used in a kinematic chain. One or more segments that behave in a non-rigid manner are replaced by a virtual rigid link in the kinematic chain that takes into account deformations of the segments (e.g. under the influence of gravity). Calibration methods permit calibration of the system using images of phantoms.

Abstract: A stent includes: wavy-line pattern bodies having a wavy-line pattern and arranged side-by-side in an axial direction; and coiled elements arranged between the wavy-line pattern bodies adjacent and extending in a spiral manner around an axis, in which all apices on opposite sides of the wavy-line pattern of the wavy-line pattern bodies that are adjacent are connected by way of the coiled element. When viewing in a radial direction, a circular direction-of the wavy-line pattern bodies is inclined with respect to the radial direction, and a winding direction of one of the coiled elements located at one side in the axial direction with respect to the wavy-line pattern bodies and a winding direction of one other of the coiled elements located at the other side in the axial direction are opposite.

Abstract: A stent 11 includes: wavy-line pattern bodies 13 having a wavy-line pattern and arranged side-by-side in an axial direction LD; and coiled elements 5 arranged between the wavy-line pattern bodies 13 adjacent and extending in a spiral manner around an axis, in which all apices 17 on opposite sides of the wavy-line pattern of the wavy-line pattern bodies 13 that are adjacent are connected by way of the coiled element 15. When viewing in a radial direction RD, a circular direction CD of the wavy-line pattern bodies 13 is inclined with respect to the radial direction RD, and a winding direction of one of the coiled elements 15R located at one side in the axial direction LD with respect to the wavy-line pattern bodies 13 and a winding direction of one other of the coiled elements 15L located at the other side in the axial direction LD are opposite.

Abstract: A stent has circular bodies having a wavy-line pattern and arranged side-by-side and coiled elements 15 arranged between the circular bodies that are adjacent and extending in a spiral manner, and apices on opposite sides of the wavy-line pattern of the circular bodies that are adjacent are connected by way of the coiled elements 15. A knob portion 19 is formed at each apex of the wavy-line pattern, and the knob portion 19 includes an extension portion 19a extending in the axis direction and a semicircle portion 19b formed at a tip of the extension portion, and the coiled element 15 is connected with the knob portion 19. A slit is formed at a part of the extension portion 19a of the knob portion 19, and the slit 21 extends in the axis direction from an inner peripheral portion at the apex of the wavy-line pattern of the circular body.