Diagnostic value of dual-energy computed tomography in irreversible transmural intestinal necrosis in patients with acute occlusive mesenteric ischemia

Figure 4 Receiver operating characteristic curves of dual energy computed tomography parameters, computed tomography subjective signs, and combined model for predicting irreversible transmural intestinal necrosis. A: Comparison of computed tomography (CT) subjective signs in predicting irreversible transmural intestinal necrosis among 102 patients. (1) Multidetector CT combined signs; (2) Decreased or absent intestinal wall reinforcement; (3) Intestinal dilatation; and (4) Substantial organ infarction; B: Comparison of the efficacy of different CT indicators in predicting irreversible transmural intestinal necrosis among 47 patients with dual energy computed tomography scans. (1) Iodine concentration, normal/lesion (IC_{normal/lesion}); (2) CT_{50 keV normal/lesion}; (3) Combined CT signs; (4) CT_{50 keV normal/lesion} combined with intestinal dilatation and substantial organ infarction (the cut-off value of CT_{50 keV normal/lesion} is 2.81); and (5) IC_{normal/lesion} combined with intestinal dilatation and substantial organ infarction (the cut-off value of IC_{normal/lesion} is 2.39).