Ribs high-density shadow low-density shadow refers to the imaging results, is a description of the lesion, because of the different density, the degree of absorption of X-ray is different, in addition to displaying the image color is different, the clinical significance represented by different. The difference between a high-density shadow and a low-density shadow of the rib cage is summarized as follows: 1. Ribs with high density, absorb more X-rays, forming a high-density shadow in the image, grayish-white, high-density lesions may be solid lesions or foci close to the bone tissue, such as calcified foci with calcium salt deposition, which presents a high-density shadow. 2. If the ribs show low density shadow, it may be rib fracture, osteoporosis, tumor or foci with high water content and cystic foci, which usually show low density shadow at this time. If abnormal density shadows are found in the ribs during the imaging examination, the relevant examination should be improved in time, the cause of the disease should be clarified, and the treatment should be standardized according to the doctor’s prescription.