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Figure 1: (a) CT showing circumferential bowel wall thickening and edema; (b) sagittal CT showing circumferential bowel wall thickening, edema and increased bowel enhancement (double halo or target sign)

Figure 1: (a) CT showing circumferential bowel wall thickening and edema; (b) sagittal CT showing circumferential bowel wall thickening, edema and increased bowel enhancement (double halo or target sign)