Abstract: Provided is a method for performing image guidance, including: acquiring a 3D magnetic resonance (MR) image of a target individual, wherein at least one region range of an object of interest is marked in the 3D MR image; acquiring a reference 3D image of the target individual, wherein the reference 3D image is a 3D-reconstructed computed tomography (CT) image; performing a 3D-3D registration on the 3D MR image and the reference 3D image, so as to mark each region range of the object of interest in the reference 3D image; and performing image guidance on the basis that the reference 3D image is adopted to characterize an initial position state.

Abstract: An image-guided method and radio therapy device are provided. The method includes: acquiring a rotation offset, a planned image and a real-time image of a target object; and determining a tracking offset based on the rotation offset, the planned image and the real-time image, the tracking offset being used for tracking the target object; where the rotation offset is generated by a position difference of the target object in a planning stage and a treatment stage. The planned image of the target object is acquired in the planning stage. The tracking offset is determined based on the rotation offset, the planned image and the real-time image. The tracking of the target object based on the tracking offset compensates for image distortion caused by the deflection of the position of the target object in the planning stage and the treatment stage.

Abstract: A tumor positioning method includes obtaining projection images of a tumor at different angles; and registering the projection images with an initial reference image to obtain a first offset. If it is determined that a virtual reacquisition operation needs to be performed according to the first offset, the method further includes generating a first reference image according to the first offset; and registering the projection images with the first reference image to obtain a second offset. If it is determined that the operation does not need to be performed according to the second offset, the method further includes outputting a first accumulated offset being a sum of the first and second offsets. The method may solve problems of long time consuming and the service life of a treatment couch and acquisition devices being reduced due to repeatedly moving the treatment couch and repeatedly acquiring the X-ray projection images.

Abstract: Provided is a simulation phantom including a simulated target volume and a simulated normal tissue encasing the simulated target volume, wherein the simulated target volume and a portion of the simulated normal tissue abutting the simulated target volume have a first characteristic to enable the simulation phantom to be imaged on a first imaging device, and the simulated target volume and the portion of the simulated normal tissue abutting the simulated target volume further have a second characteristic to enable the simulation phantom to be imaged on a second imaging device different from the first imaging device.

Abstract: Provided is a method for locating a tumor. The method includes: performing image registration on a projection image of the tumor and a first standard image to acquire a first offset; generating a second standard image based on the first offset; performing image registration on the projection image and the second standard image to acquire a second offset; and updating the second standard image based on the second offset and executing the operation of image registration on the projection image and the second standard image again in response to the second offset satisfying a virtual re-sampling condition; or outputting an accumulated offset in response to the second offset not satisfying the virtual re-sampling condition, wherein the accumulated offset is a sum of the first offset and the second offset acquired by executing the operation of image registration.

Abstract: Provided is a verification phantom. The verification phantom is provided with a slot for holding a film, wherein the slot includes a first slot and a second slot; an opening of the first slot and an opening of the second slot are both disposed on a first outer surface of the verification phantom; and an extraction groove is disposed at a junction, on the first outer surface, of the opening of the first slot and the opening of the second slot.

Abstract: Provided is a method for performing image guidance, including: acquiring a 3D magnetic resonance (MR) image of a target individual, wherein at least one region range of an object of interest is marked in the 3D MR image; acquiring a reference 3D image of the target individual, wherein the reference 3D image is a 3D-reconstructed computed tomography (CT) image; performing a 3D-3D registration on the 3D MR image and the reference 3D image, so as to mark each region range of the object of interest in the reference 3D image; and performing image guidance on the basis that the reference 3D image is adopted to characterize an initial position state.

Abstract: An image-guided method and radio therapy device are provided. The method includes: acquiring a rotation offset, a planned image and a real-time image of a target object; and determining a tracking offset based on the rotation offset, the planned image and the real-time image, the tracking offset being used for tracking the target object; where the rotation offset is generated by a position difference of the target object in a planning stage and a treatment stage. The planned image of the target object is acquired in the planning stage. The tracking offset is determined based on the rotation offset, the planned image and the real-time image. The tracking of the target object based on the tracking offset compensates for image distortion caused by the deflection of the position of the target object in the planning stage and the treatment stage.

Abstract: A tumor positioning method includes obtaining projection images of a tumor at different angles; and registering the projection images with an initial reference image to obtain a first offset. If it is determined that a virtual reacquisition operation needs to be performed according to the first offset, the method further includes generating a first reference image according to the first offset; and registering the projection images with the first reference image to obtain a second offset. If it is determined that the operation does not need to be performed according to the second offset, the method further includes outputting a first accumulated offset being a sum of the first and second offsets. The method may solve problems of long time consuming and the service life of a treatment couch and acquisition devices being reduced due to repeatedly moving the treatment couch and repeatedly acquiring the X-ray projection images.