Table 1.

Inclusion and exclusion criteria

Inclusion criteria	Exclusion criteria
1. Patients age ≥ 18 years	1. Patients age < 18 years
2. Admitted to Sichuan Emergency Center for treatment of acute pancreatitis	2. No abdominal CT examination during hospitalization
3. At least one abdominal CT examination during hospitalization	3. Previous history of gastrointestinal tumors
4. The resolution of CT images is 512*512 pixels	4. Previous history of pancreatic surgery
5. Abdominal CT for health screening patients	5. Poor quality of CT image imaging