MRI of the liver requires fasting because more accurate results can be obtained. Food from the patient’s digestive tract after eating can produce artifacts that interfere with the imaging of abdominal disease. The liver is located in the upper abdomen and is more closely related to the stomach. For example, observation of the presence of multiple occupying lesions in the liver requires consideration of liver metastases, with a high probability that the primary lesion is gastric cancer. If the patient eats, it will obscure the observation of the lesions in the stomach and affect the overall condition judgment. Therefore, both MRI and CT of the liver need to be performed on an empty stomach. However, before performing liver CT, patients need to take 500ml-1000ml of warm water by mouth, in order to fill up the intestine to facilitate observation of the stomach wall. Patients are required to fast and abstain from water for more than six hours prior to abdominal MRI, and patients must be strictly cooperative in breathing. Patients can train themselves at home to hold their breath, which generally takes 15 seconds, so that clear images can be obtained. No fasting is required if the patient is undergoing an examination of the bone and joint areas such as the head, cervical, thoracic or lumbar spine.