The researchers diided their cohort into two groups: 38 patients receied a water enema, and 38 underwent room-air insufflation. After insufflation with air or water, patients were imaged with MDCT.

• 这项实验将标本分为两组：38名患者使用水灌肠，另38名应用空气注入。在注入水或空气后，应用MDCT成像。