Transabdominal intestinal ultrasound and its parameters used in the assessment of pediatric inflammatory bowel disease

Table 2 Limberg classification of bowel wall vascularity in inflammatory bowel disease

Grade	Description
0	Normal bowel wall with no thickening, well-delineated mural stratification, no color Doppler signal
1	Wall thickening (hypoechoic wall thickening and partially obscured mural stratification) and absent mural flow
2 (hypo-flow)	Wall thickening with intermittent (or spot) increases in vascularity
3 (hyper-flow)	Wall thickening with protracted regions of increased vascularity
4 (hyper-flow)	Color Doppler flow signals in both the bowel wall and surrounding mesenteric fat