Image-guided method, radio therapy device, and computer storage medium

A radio therapy device, comprising a processor and a memory, the memory storing program instructions, the processor being configured to invoke the program instructions in the memory to execute:

• acquiring a rotation offset, a planned image, and a real-time image of a target object, the rotation offset being generated by a position difference of the target object in a planning stage prior to a treatment stage and a positioning phase of the treatment stage, the planning stage being a stage in which a treatment plan for a patient is formulated;
• 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.

A non-transitory computer storage medium, storing a computer program, wherein the computer program comprises program instructions, and the program instructions are configured to, when executed by a processor, execute:

• acquiring a rotation offset, a planned image, and a real-time image of a target object, the rotation offset being generated by a position difference of the target object in a planning stage prior to a treatment stage and a positioning phase of the treatment stage, the planning stage being a stage in which a treatment plan for a patient is formulated;
• 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.