Veno-occlusive mesenteric ischemia is less common than arterial ischemia and it is sometimes called wet ischemia as there will be more mesenteric congestion, stranding and ascites. 
It is expected that markedly congested bowel walls will have decreased motility and thus a degree of functional obstruction will be seen. 
If you have unenhanced phase, compare the density of the affected bowel walls as they are susceptible to intramural hemorrhage.