Methods for plan adjustment of radiation therapy, radiation therapy systems, and related devices

An electronic device, comprising a memory and one or more processors, wherein the memory stores a computer program, and the one or more processors are configured to implement the following steps when executing the computer program:

• S1, obtaining simulation CT information and treatment plan information of a patient, wherein the simulation CT information includes a simulation CT image and region segmentation information corresponding to the simulation CT image, the region segmentation information is used to segment a target volume and an organ-at-risk region on the simulation CT image, and the treatment plan information includes a treatment plan parameter of the target volume and the organ-at-risk region;
• S2, in a current fractionation of radiation therapy corresponding to the treatment plan information, obtaining surface optical image information of an irradiated region of the patient by measuring Cherenkov radiation emitted from the patient due to particle irradiation;
• S3, obtaining a dose distribution of the irradiated region based on the surface optical image information, the simulation CT information, and a preset mapping relationship, and obtaining irradiation dose information of the target volume and the organ-at-risk region based on the dose distribution of the irradiated region;
• S4, determining whether the treatment plan information for a subsequent fractionation of irradiation needs to be adjusted based on the irradiation dose information and the treatment plan information;
• and
• S5, in response to determining that the treatment plan information for the subsequent fractionation of irradiation needs to be adjusted, adjusting the treatment plan information for the subsequent fractionation of irradiation based on the dose distribution of the irradiated region and a treatment prescription corresponding to the patient.