CT films of kidney stones need to be read by a specialist urologist or imaging doctor, but CT films of kidney stones are relatively easy to read because stones are a high-density lesion, and their density is similar to that of bones, so as long as a bone-like high-density shadow can be seen in the kidney area on the CT film, it mostly indicates the presence of stones. However, it may also be due to inflammation and tuberculosis in the kidney itself, which requires a professional doctor to analyze. The urinary system is a symmetrical organ, such as the left kidney, the right kidney, the left ureter and the right ureter. If there is a high-density shadow in the left kidney area, left ureter area, or right kidney and right ureter area, it is highly suspected to be a stone of the urinary system. At the same time, it should be further observed whether there is any hydronephrosis in the kidney and whether there is any thinning of the kidney cortex, which is recommended to be interpreted by a professional doctor and is difficult to be read by non-professionals.