Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is enlarged . Sternal wires are grossly intact , aligned and unchanged since prior study . Retrocardiac opacity has improved . There is elevation of left hemidiaphragm , with mild atelectasis seen at the left lung base . No focal consolidation identified .
    OUTPUT:
    
1 . Sternal wires appears grossly intact and aligned on this single frontal chest radiograph . 2 . Persistent elevation of left hemidiaphragm with mild atelectasis at the left lung base .