Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hypoinflated with crowding of vasculature and mild pulmonary edema . Heterogeneous opacity within the right lower lobe noted . No left pleural effusion . Small right pleural effusion . No pneumothorax . Persistent severe cardiomegaly is accentuated due to low lung volumes . Mediastinal contour and hila are otherwise unremarkable .
    OUTPUT:
    
Mild pulmonary edema . More focal opacity at the right lung base may reflect asymmetric edema although superimposed pneumonia can not be entirely excluded .