Table 1.

Findings in the 643 low-dose CT scans.

Bowel obstruction	143 (22%)
Mechanical obstruction		132 (92%)
Small bowel			113 (86%)
Large bowel			19 (14%)
Paralytic ileus		11 (8%)
Possible intestinal obstruction	101 (16%)
Pneumoperitoneum	45 (7%)
Other findings possibly causing abdominal pain	191 (30%)
No findings	164 (25%)

Note: One scan showed both bowel obstruction and pneumoperitoneum, and thus the total number of findings is 644.