Gastrointestinal imaging-practical magnetic resonance imaging approach

Figure 4 Active Crohn’s disease. A and B: Coronal T2-weighted single shot fast spin echo without and with fat suppression and © coronal balanced steady state free precession image as well as coronal fat-suppressed post-gadolinium 3D-GRE T1-weighted images during the (D) arterial and E: interstitial phases. There is abnormal bowel wall thickening and edema involving distal ileal segments, associated with small fluid collection in the adjacent mesentery (A and B), engorgement of the mesenteric vessels (comb sign) (C-E), and extensive mucosal enhancement (D and E), in addition to the presence of enhancing mesenteric lymph nodes, in keeping with active Crohn’s disease.