Risk and Prognosis of Brain Metastasis in Non-Small Cell Lung Cancer

Inclusion Criteria: * Pathologically confirmed non-small cell lung cancer; * Age≥18 years old; * KPS score≥70; * Complete systemic imaging (including brain MRI) before treatment initiation, including contrast-enhanced MRI of the brain; * Receiving standard treatment; * Informed consent of the patient. Exclusion Criteria: * Multiple primary or metastatic tumors (except early skin cancer, cervical carcinoma in situ that has been treated radically, with no recurrence or progression for more than 5 years); * Physical examination findings, clinical laboratory abnormalities, or other uncontrolled medical conditions identified by the investigator as potentially interfering with study results interpretation or increasing the patient's risk of - Uncontrolled epilepsy, central nervous system disease, or history of mental disorders, judged by the researcher to potentially interfere with the signing of the informed consent form or affect patient compliance; * Pregnant or lactating women.