Figure 2

Qualitative image quality comparison among four b values. DWI images were obtained from a 30-year-old man. The Inflammatory lesion of approximal ileum was detected by endoscopy. When b = 800 s/mm² was adopted, the lesion was demonstrated clearly as well as normal small intestinal wall, enlarged lymph nodes and abdominal wall structure (A). When b = 1500 s/mm² was adopted, normal small intestinal wall could barely be identified (B) and when b = 2000 s/mm² or b = 2500 s/mm² was adopted (C and D), even abdominal wall structure became vague. The enlarged lymph nodes could not be identified when b = 2500 s/mm² was adopted (D).