The drug used in MRI is gadobiamide. Gadobiamide injection, also known as Onyx, is mainly used to enhance the contrast when examining MRI, so that the tissue can be more clearly visualized, and is mostly used for the qualitative diagnosis of intracranial occupational diseases. After the intravenous injection of gadobiamide, the MRI of the skull and spinal cord can enhance the contrast and facilitate the visualization of abnormal structures or lesions in different parts of the body, including the central nervous system. Patients do not require special preparation if gadobiamide is administered. Individuals may be allergic to gadobiamide, but this is rare in clinical practice. After intravenous administration of gadobiamide, the effect on liver and kidney function is relatively mild, and the metabolism time is relatively fast, and the duration of enhancement after intravenous administration of gadobiamide is about 45 minutes.