Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable mild cardiomegaly . There is mild the towards thoracic aorta , unchanged . The hila are within normal limits . Bibasilar opacities are similar appearance to prior exam and suggestive of linear atelectasis . There is no pulmonary vascular congestion or pulmonary edema . There may be a small right pleural effusion . No left pleural effusion . There is no pneumothorax .
    OUTPUT:
    
Bibasilar opacities are unchanged from prior exam from ___ and likely reflect linear atelectasis . Otherwise , no focal lung consolidation . Probable trace right pleural effusion .