Enhanced magnetic resonance T1W1 low signal and T2W1 high signal of the liver are most commonly seen in focal liver lesions, such as liver tumors, tumor-like lesions, liver abscesses, parasitic diseases, liver cysts, liver hemangiomas and other lesions. The liver is an organ with a dual blood supply, rich in venous blood, and when the liver parenchyma changes, its blood volume, local blood volume, and lesion processes undergo different pathological changes. Therefore, MRI has a certain diagnostic value for liver diseases. In particular, enhanced MRI is decisive in the detection and characterization of small intrahepatic lesions. Of course, patients should not judge or diagnose on their own based on the results of a single examination, but should consult a doctor in time, who will analyze and diagnose the disease according to the specific situation.