Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post mitral , aortic , and tricuspid valve replacement . The median sternotomy wires appear to be intact and well aligned . Mild cardiomegaly is stable . There is mild pulmonary vascular congestion an mild pulmonary edema . Linear atelectasis is seen in the mid right lung and left lower lobe , as well as a more confluent opacity in the right lower lobe Note is made of a small right pleural effusion . There is no pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Pulmonary vascular congestion and mild edema . A more confluent opacity in the right lower lobe posteriorly may reflect asymmetrical edema , but followup radiographs after diuresis is recommended to exclude the possibility of a pneumonia .