Fig. 2
From: 18F-FDG-PET-MRI for the assessment of acute intestinal graft-versus-host-disease (GvHD)
Whole-body MIP (A), contrast enhanced T1 weighted axial MRI sections (B), corresponding PET (C) and fused images (D) of a patient with acute intestinal GvHD (grade II). MR imaging shows contrast enhancement of ileal loops (thick arrow), mural stratification and hypervascular appearance of the mesentery (comb sign) (thin arrow) strongly suggesting presence of acute intestinal GvHD. 18F-FDG-PET, however, does not show increased uptake in the affected bowel segments (A,C,D)