Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size remains mildly enlarged . The mediastinal contours are unremarkable . Mild pulmonary vascular congestion appears improved compared to the previous exam . Elevation of the right hemidiaphragm is again demonstrated with linear opacities within the right base compatible with subsegmental atelectasis . Minimal streaky opacity in the retrocardiac region also is compatible with atelectasis , and overall the aeration of the lung bases is improved compared to the previous exam . No pleural effusion or pneumothorax is present . There are multiple clips within the left axillary region . No acute osseous abnormalities are demonstrated .
    OUTPUT:
    
Bibasilar atelectasis , improved compared to previous exam , with interval improvement in degree of mild pulmonary vascular congestion . Chronic elevation of the right hemidiaphragm .