The gallbladder is usually examined by ultrasound first, and MRI is not necessary if it is not necessary. If a space-occupying lesion such as gallbladder cancer is considered, MRI of the gallbladder is recommended. Color ultrasound, CT, and MRI are the most common imaging modalities used to examine the gallbladder. Among them, MRI is generally recommended for occupying lesions of the gallbladder, which can further clarify the nature, location, scope and number of the occupying lesions, and provide further basis for clinical diagnosis. It should be noted that MRI can only help in diagnosis, and further pathologic examination should be conducted to clarify whether the lesion is benign or malignant. It is recommended to choose the appropriate examination method under the guidance of the doctor, and timely treatment is needed if corresponding lesions are found.