Brain tumors can also be detected by CT of the head in the early stages. As the standard of living continues to improve, many people have annual medical checkups, and more and more diseases are found during these checkups. A normal head CT can reveal abnormal signal density shadows in the brain, which is a greater indication. If this is the case, it is important to follow up with further examination to clarify what the abnormal signal shadow is. There are many cases of abnormal signal shadows in the skull, including intracranial hematoma, cerebral infarction, arachnoid cyst, and even intracranial tumors, which are divided into benign and malignant tumors, benign tumors include meningioma, cholesteatoma, pituitary tumor, etc., and malignant tumors include medulloblastoma, glioma, etc. After the basic screening of head CT, we can have a clear direction, and then further do CT enhancement and MRI enhancement can clarify the basic nature of these tumors and better guide the later treatment.