The invention belongs to the technical field of medical
image processing, and particularly relates to a left-hand X-
ray image double-stage
bone age evaluation system based on cross-
modal learning. The
system comprises a
data preparation module, a coarse
granularity classification module, a fine
granularity regression module and an output module. The method comprises the following steps: firstly, preprocessing a hand X-
ray image, and constructing cross-
modal feature input in combination with
structured text description of a standard
bone age map; through an SBA-CLIP + cross-
modal learning model, alignment and fusion of image features and text features are realized, and coarse-grained classification of
bone age intervals is completed; and according to a
classification result, dynamically calling a fine classification sub-model of a corresponding interval, and realizing fine regression prediction of the bone age. In the process, a bimodal attention alignment module is introduced to enhance internal feature representation of images and texts, and cross-modal alignment and classification are improved in combination with a comparison
loss function guided by cyclic consistency. According to the method, the prediction precision and
interpretability are remarkably improved, and the method has wide application prospects and
clinical value.