Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires again noted . Persistent small left pleural effusion with left basal atelectasis is not significantly changed from prior exam . A calcified granuloma projects over the right upper lung . There is no new consolidation . No signs of edema . Cardiomediastinal silhouette is stable . Bony structures are intact . Tracheostomy poorly visualized .
    OUTPUT:
    
Persistent small left pleural effusion and atelectasis .