The invention discloses a mediastinal region
lymph node metastasis identification method and
system based on a double-control routing
hybrid expert model, and belongs to the technical field of computer intelligent auxiliary diagnosis. The invention aims to solve the problems that the existing mediastinal region
lymph node metastasis identification method is low in accuracy and poor in identification effect due to the fact that the mediastinal region
lymph node metastasis identification task is complicated and includes multi-dimensional information identification. According to the technical key points, a mediastinal region
lymph node metastasis identification task is split into two auxiliary sub-tasks of mediastinal
region detection and
lymph node metastasis prediction, and the three tasks jointly form a multi-
task learning system. Knowledge transmission and
complementation are realized through
feature sharing between tasks and gradient-based collaborative optimization, so that the feature distinguishability of each task is improved. The method is characterized in that a double-control routing gating mechanism is constructed, similar features and unique features between different tasks are extracted through a feature routing
branch and a task routing
branch respectively, and correlation and difference between the tasks are balanced; meanwhile, a two-dimensional gradient balance
algorithm is designed, multi-task gradient optimization is carried out from two angles of
gradient direction alignment and amplitude
dynamic balance, and the problems of gradient conflicts and task dominance are solved while gradient feature distribution between tasks is kept.