In recent years, it has been increasingly extended to the diagnosis, treatment, prognosis judgment and monitoring of central nervous system tumors, leukemia , parasites, cerebrovascular diseases and immune function of neural cells, becoming an indispensable and powerful helper in clinical work; combined with flow cytometry and immunohistochemistry, it has enabled some difficult neurological diseases to be diagnosed. MRI of the spine is the diagnostic correct rate of spinal and spinal cord diseases MRI is significantly higher than CT, and the source of disease is shown and accurately localized, so it can be the preferred examination method. If pathologic tissue is included, on T1-weighted imaging the order of decreasing brightness is fat, bone marrow, 4- to 5-day old hemorrhage, protein-rich fluid (e.g., necrotic tissue), mucus, melanin, slow blood flow (e.g., venous blood) free radicals, and GDDTPA as MRI enhancer. The order of decreasing brightness in T2-weighted imaging is tumor, gliosis (gliosis), edema, 1-week old hemorrhage, fluid, and vertebral interrogative disc. Those with dark (low) signal on both T1- and T2-weighted imaging are air, rapid blood flow (e.g., arterial blood), calcium, iron, fresh blood over several days, ligaments, tendons, and other magnetically sensitive material.