Western medicine has developed more rapidly in recent times, and medical tests have emerged. This has brought convenience in diagnosing diseases, but some diagnostic tools have also brought health risks to people’s health, even with cancerous effects. One of them includes CT examinations. CT was invented in the 1970s, which is also known as X-ray computed tomography (Computed Tomography), and its source of radiation is ionizing radiation, which by its nature increases the rate of mutation in human cells and increases the risk of cancer. The intensity of X-rays used in CT is higher than that of ordinary X-rays. In contrast, thin-layer CT is a diagnostic CT in conventional imaging departments that allows the introduction of CT-enhanced contrast agents, whose enhancement is directed at peripheral vascular imaging. Thin layer scans (1-5 mm layer thickness with layer spacing) have thinner layer thickness compared to conventional CT scans (10 mm layer thickness with layer spacing), and plain thin layer CT can improve the detection rate of lesions and avoid missing small lesions. It can be seen that although thin layer CT detection is more accurate, its radiation exposure is also significantly higher. This point must be clear, and thin layer CT should be avoided as much as possible, at least not too often. CT diagnosis has been widely used in clinical practice due to its special diagnostic value. However, CT equipment is relatively expensive, the examination cost is high, and the examination of certain parts, the diagnostic value, especially qualitative diagnosis, has some limits, so it is not appropriate to consider CT examination as a routine diagnostic tool, and should be applied reasonably based on understanding its advantages. x-ray radiography, CT, and magnetic resonance imaging can be called a troika, and the organic combination of the three makes the current imaging examination both expand the scope of examination and The organic combination of the three has enabled current imaging examinations to both expand the scope of examination and improve the level of diagnosis.