Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Mild enlargement of cardiac silhouette is unchanged . Mediastinal and hilar contours are similar . Pulmonary vasculature is not engorged . Lung volumes are low . Streaky opacity in the right lung base likely reflects subsegmental atelectasis . Small right pleural effusion is unchanged . No pneumothorax is demonstrated . Left - sided PICC tip terminates in the low SVC . No acute osseous abnormality is detected .
    OUTPUT:
    
Unchanged right basilar opacity , likely atelectasis , with small right pleural effusion .