Abstract: The present disclosure provides a tumor motion model determination method and an electronic device. The method includes acquiring a scanning image of a target object during a positioning stage, and a respiratory signal of the target object; and determining a tumor motion model based on a planning image of the target object, a position of a tumor of the target object in the scanning image, and the respiratory signal. Herein, the tumor motion model is used to characterize an orientation change situation of the tumor of the target object during a respiratory process of the target object.

Abstract: The present disclosure provides a tumor positioning method, a device, and a storage medium. The method includes acquiring a target projection image and a reference image of a target object including a tumor at a target angle; determining a tumor positioning manner corresponding to the target angle according to a type of the target angle; and performing matching processing on the target projection image and the reference image based on the tumor positioning manner corresponding to the target angle, to obtain a position of the tumor in the target projection image.

Abstract: The present disclosure provides a tumor position determination method and an electronic device. The method includes acquiring a projection image of a target object at a target angle, determining a target phase image whose image feature is the most similar to an image feature of the projection image from phase images of the target object, and determining a target initial position of the tumor of the target object corresponding to the target phase image, finally performing registration on the target phase image and the projection image based on the target initial position to obtain a position of the tumor of the target object. Herein, the projection image is a projection image obtained by imaging the tumor of the target object. The phase images include two-dimensional images of the target object at a plurality of respiratory phases at the target angle.

Abstract: The present disclosure provides an imaging method and an imaging system, including a multi-focal tube and a detector arranged opposite to the multi-focal tube. The method includes grouping focal light sources in the multi-focal tube to obtain a plurality of focal light source groups and controlling the multi-focal tube to sequentially expose the plurality of focal light source groups, each of which includes at least one focal light source; acquiring sequentially, from the detector, a projection image of a target soft tissue exposed by each focal light source group, where the projection image includes a sub-projection image of the target soft tissue irradiated by each focal light source in the focal light source group corresponding to the projection image; and reconstructing a plurality of sub-projection images in the projection image corresponding to each focal light source group to obtain a three-dimensional image of the target soft tissue.

Abstract: The present disclosure provides a tumor positioning method, an electronic device, and a storage medium. The method includes acquiring a plan image and a real-time image of a reference object that are associated with a motion trajectory of a to-be-positioned tumor; determining boundary mask information of the reference object according to the plan image; determining deformation information of the reference object according to the plan image and the real-time image; determining a motion trajectory of the reference object according to the boundary mask information and the deformation information; and positioning and tracking the to-be-positioned tumor according to the motion trajectory of the reference object.

Abstract: Provided are an image acquisition method, an imaging system, calibration equipment and a storage medium. The image acquisition method includes: acquiring a projection image formed by an imaging beam passing through a barrier array plate; acquiring scattered sampling points corresponding to the barrier posts in the projection image; interpolating a vacancy between every adjacent scattered sampling points to obtain interpolated sampling points; and acquiring a scattering distribution map corresponding to the projection image based on the scattered signals of the scattered sampling points and of the interpolated sampling points.

Abstract: An image processing method includes: obtaining a guidance image, the guidance image being an image generated based on an image-guided radiation therapy system; and performing image processing on the guidance image to generate a target image, the target image being a computed tomography simulation image corresponding to the guidance image.

Abstract: Provided is a method for determining tube electrical parameters. The method includes: acquiring target projection data of an imaging device in scanning a target object at a first scan angle; acquiring target noise data corresponding to the target object; determining current noise data corresponding to the target projection data; and determining, based on the target noise data and the current noise data, the tube electrical parameters of the imaging device in scanning the target object at a second scan angle.

Abstract: Provided are an image acquisition method, an imaging system, calibration equipment and a storage medium. The image acquisition method includes: acquiring a projection image formed by an imaging beam passing through a barrier array plate; acquiring scattered sampling points corresponding to the barrier posts in the projection image; interpolating a vacancy between every adjacent scattered sampling points to obtain interpolated sampling points; and acquiring a scattering distribution map corresponding to the projection image based on the scattered signals of the scattered sampling points and of the interpolated sampling points.

Abstract: Provided is a method for determining tube electrical parameters. The method includes: acquiring target projection data of an imaging device in scanning a target object at a first scan angle; acquiring target noise data corresponding to the target object; determining current noise data corresponding to the target projection data; and determining, based on the target noise data and the current noise data, the tube electrical parameters of the imaging device in scanning the target object at a second scan angle.

Abstract: It is disclosed a method for controlling the protection switching in a communication network having a ring topology. The method applies when a lockout of protection command is applied at a node, a bidirectional failure occurs on a span connecting the node to an adjacent node, and the lockout of protection command is subsequently removed. The method comprises, at any one of the node and the adjacent node, detecting the failure and, if there is not a further lockout of protection command locally applied at the any one of the node and the adjacent node, sending a request packet carrying a signal fail indication towards the other node.

Abstract: The present invention relates to a regulating valve for regulating and automatically controlling a fluid for a constant flow, comprising a valve body, a valve stem in the body, a pressure difference transducer, a first clack, and a second clack whose main body is a sleeve. At the outside of the sleeve are provided two concentric projects and guiding ribs perpendicular to the projects. The invention, compared to the prior art, has advantages of good performance and reliability, simple and compact structure. The regulating valve according to the invention can automatically regulated with an electric actuator or a pneumatic actuator.