Small intestine contrast ultrasonography in a 20-year-old female with Crohn’s disease. In each panel ((a)–(d)) white arrows indicate disease extent of the terminal ileum. The cumulative extent of the sonographic Crohn’s disease lesion was 26 cm. In (a), on the left side, red arrow indicates bowel wall thickness (5.3 mm) of the terminal ileum and in (b) (on the left side) and (d) green (both right and left sides) arrows indicate lumen diameter (raging from 8 to 22 mm) at level of the terminal ileum.
