Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , aeration of the left lower lobe has improved with persistent but decreased size of the left pleural effusion , best appreciated on lateral view . . Is minimal residual atelectasis remaining in the left lower with lung volumes overall slightly improved in the interim . Residual mild retrocardiac opacity is likely atelectasis . No significant right pleural effusion . No focal consolidation to suggest focal pneumonia . No effusion or pneumothorax . There is perhaps mild central pulmonary vascular congestion but no edema . Heart size is top normal . The descending thoracic aorta slightly tortuous or ectatic , unchanged .
    OUTPUT:
    
1 . Small left pleural effusion and atelectasis , decreased since the prior exam . 2 . No focal pneumonia .