Table 1

Definition of the six components of the magnetic resonance (MR) score

Radiological item of the magnetic resonance score	Abbreviation^*	Plane	MR sequence	Definition
Diffusion-weighted imaging hyperintensity	DWI-HI	Axial	Diffusion-weighted imaging	Presence of hyperintensity in the colonic wall segment in the DWI sequence.
Rapid gadolinium enhancement after intravenous contrast medium administration	GADO	Axial	Gradient-echo T1-weighted, arterial phase	Gadolinium enhancement in the arterial phase (20 to 25 s after gadolinium infusion)
Differentiation between the mucosa–submucosa complex and the muscularis propria	—	Axial	Single shot fast spin echo short time echo without fat saturation	Distinction in the colonic wall between two layers: (1) mucosa–submucosa complex hyperintensity; (2) muscularis propria hypointensity
Bowel wall thickening	—	Axial and coronal	Gradient-echo T1-weighted, delayed phase	Thickness of the colonic wall exceeding 5 mm.
Parietal oedema	—	Axial and coronal	Single shot fast spin echo, short time echo, without fat saturation	Thickness of the colonic wall exceeding 5 mm and hyperintensity of the mucosa–submucosa complex
Ulceration	—	Axial and coronal	2D Steady-state, free precession imaging (Fast Imaging Employing Steady-state Acquisition, General Electric Company, US)	Loss of substance in the mucosa–submucosa complex