Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are moderately well - expanded with mild vascular congestion . Heterogeneous bibasilar opacities are noted . No pleural effusion or pneumothorax . The heart is mildly enlarged which has increased since prior examination . Mediastinal contour and hila are unremarkable .
    OUTPUT:
    
1 . Heterogeneous bibasilar opacities may represent atelectasis or pneumonia in the appropriate clinical setting . 2 . Mild vascular congestion .