Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac and mediastinal contours are stable . The pulmonary vascularity is normal . There is a persistent moderate - sized left pleural effusion with left basilar opacification , which may represent atelectasis . Trace right pleural effusion is also visualized . and unchanged There is no pneumothorax . No acute osseous abnormalities are seen .
    OUTPUT:
    
No significant interval change from prior with continued moderate - sized left and trace right pleural effusions and left basilar opacity , likely reflecting compressive atelectasis , though infection is not excluded .