Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes bilaterally . Probable mild left basilar atelectasis . There is blunting of the left costophrenic angle . Cardiomediastinal silhouette is unchanged . There is no pneumothorax .
    OUTPUT:
    
No evidence of pneumonia . Probable mild left basilar atelectasis with blunting of the left costophrenic angle .