The application belongs to the technical field of radiotherapy, and relates to a monitoring and interaction
system for a radiotherapy scene, a model construction method and a medium. The
system synchronously collects multi-
modal physiological data of a patient through a ring-shaped collection device arranged between a radiotherapy device head and a treatment
bed, and realizes linkage control and patient interaction guidance in a radiotherapy process based on multi-source heterogeneous
data assimilation, physical constraint digital twin modeling and real-time prediction. A unified technical
system of "multi-
modal physiological data synchronous collection-multi-source heterogeneous
data assimilation-physical constraint digital twin modeling-real-time prediction and linkage control" is constructed, so that real-time mapping,
trend prediction and active
interaction control of the physiological state of the patient can be realized without interfering with the operation of the radiotherapy device, and the treatment accuracy, safety and
patient compliance in the radiotherapy process are improved.