Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is left basilar atelectasis and slight blunting of the left costophrenic angle . Aeration of the left lower lobe is improved . Platelike atelectasis is again seen at the level of the left hila . The heart remains enlarged . The aorta is tortuous . There is no pneumothorax . Median sternotomy wires are intact . The right internal jugular central venous line has been removed over the interval .
    OUTPUT:
    
Improved aeration of left lower lobe , with mild persistent atelectasis and blunting of the left costophrenic angle .