Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Compared to prior study , there is no significant change . The left heart border continues to be obscured likely due to prominent fat pad . There is right lower lung atelectasis . There is no pleural effusion . Heart size is enlarged . Median sternotomy wires are again noted .
    OUTPUT:
    
No acute pneumonia .