In addition to assessment of the aforementioned relevant clinical and biochemical parameters in AP, computed tomography (CT) scanning is considered the reference standard not only for diagnostic purposes but also for assessing the severity of AP. Enhanced CT severity index (CTSI) and unenhanced Balthazar score have been regarded as the conventional CT scoring systems. However, some investigators have suggested that CT on admission is not useful because it takes a few days for pancreatic necrosis to develop, and CT scans obtained in the early phase of AP would not change clinical management.[14–16] They also have recommended that CT studies should be reserved for only those patients predicted to have severe AP by clinical assessment. Moreover, the use of contrast agents may worsen the course of the pancreatitis.