Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pulmonary vascular congestion is not associated with pulmonary interstitial edema . Ill - defined retrocardiac airspace opacity most likely represents atelectasis . There is no focal consolidation , pleural effusion , or pneumothorax . Mediastinal clips and median sternotomy wires , including a fracture of the inferior - most wire , are unchanged .
    OUTPUT:
    
Mild pulmonary vascular congestion without frank edema . No focal consolidation .