[2] Noncontrast CT in the emergency ... in deciding when to use contrast. For example, contrast is more likely to be of benefit in the patient with undifferentiated abdominal pain where acute ...

Vidal, MD In Figure 1 (KUB), a flat upright view of the abdomen showed moderate amount of stool in the descending colon and rectum, without any evidence of obstruction. A CT scan without contrast ...