Fig. 4

The whole-abdomen CT images: lesions in the intestine presented as thickening of the bowel wall and blood in the intestine presented as slightly dense shadows in the intestine. Patient A: A a slightly dense shadow in part of the small bowel and colorectal lumen (red arrow), B a slightly thickened small bowel wall in part of the left mid abdomen in the coronal section (red double arrow), and C a slightly thickened small bowel wall in the transverse section (red double arrow) and a slightly dense shadow in part of the small bowel (red arrow). Patient B: D thickening of the bowel wall in the lower part of the descending colon (red arrow), E long diameter of the thickened portion of the bowel (red double arrow), and F transverse diameter of the thickened portion of the bowel (red double arrow)