Colorectal cancer automatic staging method and system based on CT image, medium and equipment

The invention discloses a colorectal cancer automatic staging method and system based on a CT image, a medium and equipment. The method comprises the following steps: preprocessing the CT image to construct an initial data set; performing data cleaning, and correcting the proportion of positive and negative samples in the data set; performing data enhancement on the data set; performing importance screening on the channel features and the spatial features by using a CBAM attention mechanism, and using residual connection; selecting the category with the maximum prediction probability as the final prediction category of each element so as to determine the positions of the colorectal tumor area and the non-rectal tumor area of the output image; a block reasoning method is used for the predicted image; and on the basis of a data fusion idea, performing channel dimension merging on the CT image containing the tumor region and the original CT image, and inputting the merged image into the optimized 3D U-Net segmen