Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate bilateral perihilar opacities , consistent with mild pulmonary edema . This is coupled with pulmonary vascular engorgement in the upper lobes as well as blunting of the left costophrenic angle , consistent with small pleural effusion . However , the heart and mediastinum are not enlarged . Aside from bibasilar atelectasis , the lungs are clear . There is no pneumothorax .
    OUTPUT:
    
Mild pulmonary edema , small left pleural effusion , and pulmonary vascular redistribution . Because the heart and mediastinum are not widened , non-cardiac causes of pulmonary edema should be explored . The patient could be empirically treated via diuresis , but if the clinical picture is not in agreement , CT of the chest may be obtained for further characterization .