Abstract: A bi-planar robotic arm device for vascular interventional surgery includes an operating table, a frame assembly, an outer arm assembly, and an inner arm assembly. The frame assembly includes a standing column, a sliding block, a sliding platform, a support, and a screw stepper motor. The standing column is arranged on the operating table. The support is arranged on the standing column. The sliding platform is arranged on the support. The sliding platform is connected to the sliding block. The sliding block is connected to the screw stepper motor and can slide along the sliding platform under the action of the screw stepper motor. The outer arm assembly is connected to the standing column. The inner arm assembly is connected to the outer arm assembly and the sliding block. The inner arm assembly and the outer arm assembly can move relative to each other.

Abstract: A bi-planar robotic arm device for vascular interventional surgery includes an operating table, a frame assembly, an outer arm assembly, and an inner arm assembly. The frame assembly includes a standing column, a sliding block, a sliding platform, a support, and a screw stepper motor. The standing column is arranged on the operating table. The support is arranged on the standing column. The sliding platform is arranged on the support. The sliding platform is connected to the sliding block. The sliding block is connected to the screw stepper motor and can slide along the sliding platform under the action of the screw stepper motor. The outer arm assembly is connected to the standing column. The inner arm assembly is connected to the outer arm assembly and the sliding block. The inner arm assembly and the outer arm assembly can move relative to each other.

Abstract: Mechanical fingers for clamping catheters, guild wires, and the like equipment for vascular intervention include a left clamping panel, a right clamping panel, left gathering pieces, right gathering pieces, a linear-propelling mechanism, and a frame. The linear-propelling mechanism is arranged on the frame. The left clamping panel and the right clamping panel are oppositely arranged, and are each arranged on the linear-propelling mechanism. The left gathering pieces and the right gathering pieces are arranged on the left clamping panel and the right clamping panel, respectively. The linear-propelling mechanism drives the left clamping panel and the right clamping panel to move towards or move away from each other. The mechanical fingers can realize adaptive clamping for intervening equipment in a widely varying diameter range. The clamping surfaces of panels in the mechanical fingers are provided with grid-and-stripe microstructures and are made from resilient materials.

Abstract: An operating handle with feedback of guidewire/catheter advancement resistance for a vascular intervention robot includes a sliding guide rail, a fixing base plate, a connecting rod, an operation rod, a pressure sensing device, a rotary driving device, and a linear motor. The rotary driving device, the sliding guide rail, and a stator of the linear motor are arranged on the fixing base plate. The pressure sensing device and a rotor of the linear motor are connected with the sliding guide rail through a slider and are able to reciprocate along the sliding guide rail. The connecting rod has one end provided with the operation rod and the other end connected with the rotor of the linear motor through a strain gauge. The connecting rod passes through the pressure sensing device and the rotary driving device in sequence.

Abstract: The present application relates to an image registration method, comprising: selecting a registration source image {pi} and a registration target image {qj}; applying a random perturbation to {pi} in accordance with a preset random perturbation control parameter ? so that it is deformed to obtain {pi?}, and obtaining a set of closest points, i.e., {gj?}, on {qj} corresponding to points on {pi?}; performing an iterative operation on {pi?} and {qj?} in accordance with a preset initial coordinate transformation H0 to obtain a coordinate transformation {H1}, 0<I<=L, between {pi?} and {qi?}, and calculating an average distance {E1} corresponding to the coordinate transformation {H1} in accordance with the coordinate transformation {H1}; judging magnitudes of the average distance {E1} and a preset ideal average distance Ex, and terminating the registration when the average distance {E1} is smaller than or equal to the preset ideal average distance.

Abstract: A bone screw comprises a threaded portion. The threaded portion has a first thread including a first front surface (11), a first back surface (12) and a crest. A second thread including a second front surface (16) and a second back surface (17) is formed on at least part of the crest of the first thread. Because of the presence of the second thread, a contact area between the screw and a bone and an axial pullout force-bearing area are both significantly increased, without significantly influencing the bending resistance, so that the mechanical property of the screw is entirely improved.

Abstract: The present application relates to an image registration method, comprising: selecting a registration source image {p,} and a registration target image {qj}; applying a random perturbation to {pi} in accordance with a preset random perturbation control parameter ? so that it is deformed to obtain {pi?}, and obtaining a set of closest points, i.e., {qj?}, on {qj} corresponding to points on {pi?}; performing an iterative operation on {pi} and {qj?} in accordance with a preset initial coordinate transformation H0 to obtain a coordinate transformation {Hl}, 0<l<L, between {pi?} and {qj?}, and calculating an average distance {El} corresponding to the coordinate transformation {Hl} in accordance with the coordinate transformation {Hl}; judging magnitudes of the average distance {El} and a preset ideal average distance Ex, and terminating the registration when the average distance {El} is smaller than or equal to the preset ideal average distance.

Abstract: A bone screw comprises a threaded portion. The threaded portion has a first thread including a first front surface (11), a first back surface (12) and a crest. A second thread including a second front surface (16) and a second back surface (17) is formed on at least part of the crest of the first thread. Because of the presence of the second thread, a contact area between the screw and a bone and an axial pullout force-bearing area are both significantly increased, without significantly influencing the bending resistance, so that the mechanical property of the screw is entirely improved.

Abstract: A human cavity inner wall three-dimensional mapping method, and a corresponding device and system, comprising: at least one field generating device which generates a plurality of distinguishable fields under excitation of a drive signal; at least one field sensor located in a target device for detecting the distinguishable fields to generate a sensor signal; and a positioning signal processing device for transmitting the drive signal to the field generating device and detecting the output of the field sensor signal to acquire data of five-dimensional position and orientation coordinates of a position on the target device where the sensor is located.

Abstract: A method for simulating the bend shape of a catheter (20) includes providing at least two sensor elements (24,25) in the catheter (20), and said sensor elements (24,25) traverse magnetic line of force to generate induced current. Space information of the sensor elements (24,25) is extracted from the induced current information, and the bend shape of the catheter (20) is calculated according to aforementioned space information in combination with characteristic information of the catheter (20). A catheter (20) includes a catheter body (22), at least two magnetic sensors (24,25), a signal extracting device (40), and a simulating and processing device (50).

Abstract: A novel shape memory alloy of Fe—Mn—Si system containing at least Fe, Mn, and Si wherein the alloy contains niobium carbide in the structure and is improved in that a sufficiently satisfactory shape memory effect is provided without carrying out a special treatment termed training.

Abstract: A novel shape memory alloy of Fe—Mn—Si system containing at least Fe, Mn, and Si wherein the alloy contains niobium carbide in the structure and is improved in that a sufficiently satisfactory shape memory effect is provided without carrying out a special treatment termed training.