Target object tracking method, tracking system and electronic device for use in radiotherapy

An electronic device, comprising a processor and a memory, wherein the processor and the memory are in communication connection, and the memory stores a computer program;

• and
• the processor is configured to execute a tracking method, the tracking method comprising:
• acquiring an actual scattering image of a target object at time i, wherein i is an integer greater than 0, and the actual scattering image is generated according to rays scattered by a body tissue where the target object is located;
• processing the actual scattering image or a reference image corresponding to the actual scattering image with a preset model, and determining a location offset of the target object at the time i according to the processing result, the preset model being indicative of a location conversion relationship of corresponding pixels in images that are formed before and after the rays are scattered;
• and
• tracking the target object according to the location offset of at least one time, the at least one time comprising the time i,
• wherein the preset model is a deconvolution model, and the processing the actual scattering image or a reference image corresponding to the actual scattering image with a preset model, and determining a location offset of the target object at the time i according to the processing result comprises:
• performing deconvolution processing on the actual scattering image by using the deconvolution model to acquire a target image;
• and
• comparing the target image with the reference image, and determining the location offset at the time i according to the comparison result;
• or
• wherein the preset model is a convolution model, and the processing the actual scattering image or a reference image corresponding to the actual scattering image with a preset model, and determining a location offset of the target object at the time i according to the processing result comprises:
• performing convolution processing on the reference image by using the convolution model to acquire a reference scattering image;
• and
• comparing the reference scattering image with the actual scattering image, and determining the location offset at the time i according to the comparison result.

A tracking system, comprising a ray source, a detector and a processor, the detector being electrically connected with the processor, wherein:

• the ray source is configured to emit rays to body tissue where a target object is located at time i, wherein i is an integer greater than 0;
• the detector is configured to receive the rays scattered on the body tissue, convert the rays into a scattering image generation signal, and send the scattering image generation signal to the processor;
• the processor is configured to generate an actual scattering image of the target object according to the scattering image generation signal sent by the detector;
• process the actual scattering image or a reference image corresponding to the actual scattering image by using a preset model, and determine a location offset of the target object at the time i according to the processing result, the preset model being indicative of a location conversion relationship of corresponding pixels in images that are formed before and after the rays are scattered;
• and track the target object according to the location offset of at least one time, the at least one time comprising the time i, and
• the ray source comprises a first ray source and a second ray source, and the detector comprises a first detection plate and a second detection plate, wherein:
• the first detection plate is configured to receive the rays emitted by the second ray source and scattered on the body tissue, convert the rays into a first scattering image generation signal, and send the first scattering image generation signal to the processor, and correspondingly, the processor is configured to generate a first actual scattering image of the target object according to the first scattering image generation signal sent by the detector;
• and
• the second detection plate is configured to receive the rays emitted by the first ray source and scattered on the body tissue, convert the rays into a second scattering image generation signal, and send the second scattering image generation signal to the processor, and correspondingly, the processor is configured to generate a second actual scattering image of the target object according to the second scattering image generation signal sent by the detector.