Depending on the purpose of the examination and the tissue to be examined, CT and MRI have their own advantages, and there is no such thing as who is better. Magnetic resonance is more effective in checking the gallbladder for occupancy and lesions; enhanced CT is better for checking gallbladder stones, polyps, cholecystitis, etc. to determine the nature of the mass. 1. Magnetic resonance relative effect is good: relative to CT, magnetic resonance on soft tissue structure imaging rate is higher, such as found gallbladder occupancy, gallbladder tissue lesions, magnetic resonance can be more clear to see the occupancy of the site, size and whether metastasis. Patients with metal body, such as dentures, pacemakers, etc. are prohibited to check the MRI. 2. Enhanced CT is relatively effective: Enhanced CT can judge the gallbladder diseases that cannot be clearly defined by scanning CT, increase the contrast between local tissues through intravenous injection of contrast medium, observe the speed, time and degree of aggregation of blood flow in tissues and masses, and judge the nature of masses. It is contraindicated for those who are allergic to the contrast agent and those with abnormal kidney function. Therefore, different methods can be used to examine different diseases, and generally a variety of tests are needed to complement each other and make a comprehensive judgment in order to make an accurate diagnosis.