A parameter calibration method, device, and system for an X-ray machine. The method comprises: controlling a rotating arm of an X-ray machine to rotate about and scan a standard phantom, and acquiring projection results of the standard phantom at multiple preset rotation positions (S110); recording, at each of the preset rotation positions, a mechanical structure motion state of the rotating arm (S120); calibrating, at each of the preset rotation positions and according to the projection results of the standard phantom, an error parameter to obtain a calibration result of the error parameter (S130); and generating, according to the mechanical structure motion state of the rotating arm at each of the preset rotation positions and the calibration result of the error parameter, a dynamic correction matrix for correcting an actual project result of the X-ray machine (S140).

A stainless steel and plastic combined piece and a processing method therefor. The combined piece comprises a stainless substrate (1). When etched by an etchant, the surface of the stainless steel substrate (1) is provided with several recessed structures (11). The average depth of the recessed structures (11) is 0.1-30 micrometers and the average width is 0.2-15 micrometers. A plastic (2) is injection molded on the stainless steel substrate (1). Parts of the structure of the plastic (2) are embedded in the recessed structures (11). The recessed structures (11) formed when the stainless steel substrate (1) is etched by the etchant are of the micrometer level, the combined piece is provided with improved stability and increased airtightness when the plastic (2) is injection molded, thus reducing process steps, reducing production costs, being applicable in large-scale production, placing no special material requirement with respect to the injection molded plastic (2), and having a widened range of applications.

A stainless steel and plastic combined piece comprising a stainless steel substrate (1). The stainless steel substrate is provided on the surface thereof with honeycomb pores (11). The stainless steel substrate is provided on the surface thereof with a nitrided layer by means of a solid solution nitriding treatment. The thickness of the nitrided layer is greater than 10 nm. A plastic material (2) is injection molded on the stainless steel substrate. The plastic material is embedded into the honeycomb pores. Also disclosed is a processing method for the stainless steel and plastic combined piece. The combined piece increases the binding force between the stainless steel substrate and the plastic material.

A method and device for tracking a ridge line of a blood vessel. The method comprises: performing global ridge point detection on an angiographic image to determine a ridge point space (101); randomly selecting a ridge point in the ridge point space as a tracking starting point, and determining two neighboring ridge points and two initial tracking directions of the tracking starting point on a tracking ridge line (102); using the two neighboring ridge points as end points, separately sequentially tracking other ridge points on the tracking ridge line along the two initial tracking directions, and continuously updating end points and current tracking directions in a tracking process (103); marking a tracked ridge line, deleting traversed ridge points on the tracked ridge line, and updating the ridge point space (104); and repeating a ridge line tracking process according to the updated ridge point space until the number of ridge points in the updated ridge point space is less than a first threshold value, and then ending ridge line tracking (105). The method features fewer iteration parameters, small amount of computation, and a simple algorithm, and can quickly completing ridge line tracking of a vascular centerline.

A stainless steel and plastic combined member, and a processing method therefor. The stainless steel and plastic combined member comprises a stainless steel substrate (1). Honeycomb pores (11) are formed on the surface of the stainless steel substrate (1). An oxide film (12) is formed on the surfaces of the honeycomb pores (11) by means of a 120-10 minute-high temperature oxidation treatment at a temperature of 110-450ºC, the volume content of oxygen in the high temperature oxidation treatment atmosphere being 75%-100%. The oxide film (12) at least comprises two of an iron oxide, a chromic oxide, and a nickel oxide. A plastic material (2) is formed on the stainless steel substrate (1) by means of injection molding. The plastic material (2) is embedded into the honeycomb pores (11). The oxide film implements a good heat insulation effect and improves the combining force between the stainless steel substrate (1) and the plastic material (2).

A stainless steel and plastic combined member, comprising a stainless steel substrate (1). Honeycomb pores (11) are formed on the surface of the stainless steel substrate (1). An oxide film (12) is formed on the surfaces of the honeycomb pores (11) by means of a passivation treatment using an organic oxidizing solution. The oxide film (12) at least comprises two of an iron oxide, a chromic oxide, and a nickel oxide. A plastic material (2) is formed on the stainless steel substrate (1) by means of injection molding. The plastic material (2) is embedded into the honeycomb pores (11). Also disclosed is a processing method for a stainless steel and plastic combined member.