Abstract: Disclosed are methods and devices of processing a low-dose computed tomography (CT) image. The present disclosure provides a method of processing a low-dose CT image. The method comprises: receiving a first chest image; receiving a first chest image; detecting at least one lung nodule in the first chest image; determining at least one lung nodule region of the first chest image based on the at least one lung nodule; and classifying the at least one lung nodule region based on a first set of radiomics features of the at least one lung nodule region of the first chest image to obtain a nodule score of the at least one lung nodule in the lung nodule region. The first chest image generated by a low-dose CT method.