Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly enlarged . The mediastinal contours are unremarkable . There is mild pulmonary vascular congestion with patchy opacity in the right lung base , potentially atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Mild pulmonary vascular congestion . Patchy opacity in the right lung base may reflect atelectasis , however an infectious process is not excluded .