Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . The mediastinal and hilar contours are within normal limits . There is no pulmonary vascular congestion . Right lower lobe patchy opacity could reflect atelectasis . No focal consolidation , pleural effusion or pneumothorax is visualized .
    OUTPUT:
    
Patchy right basilar opacity could reflect atelectasis . No evidence for congestive heart failure .