Table 2.

Parameters of interest for the MRE assessment of bowel inflammation in Crohn’s disease and corresponding MRE findings.

MRE parameter	Definition/cut-off value
DWI	Hyperintense signal at a b-value of 800 s/mm
Mean ADC	ROI at 10-30 mm2
Wall thickening	≥ 3 mm
Intramural edema	Hyperintense signal on fat-saturated T2-weighted images
Ulcerations	Appear as small focal breaks in the intraluminal surface of the bowel
Stricture	Upstream lumen > 3 cm
Hyperenhancement	Attenuation on a contrast-enhanced scan higher in a segment that is not contracted than in nearby small bowel segments that are normal
MaRIA	≥ 11
Clermont score	≥ 12.5