Figure 1a. Ischemia-reperfusion injury in a patient with bilateral lung transplants for idiopathic pulmonary hypertension. (a) Chest radiograph, obtained 24 hours after lung transplantation, demonstrates bilateral lower-lobe heterogeneous airspace opacities (arrow) with peribronchial and perivascular thickening. (b) Chest radiograph, obtained more than 48 hours after transplantation, demonstrates interval resolution. Although the findings are nonspecific, the temporal relationship with regard to lung transplantation and the rapid resolution of the abnormal radiographic features are suggestive of this diagnosis.