Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Severe chronic cardiomegaly is present . There is no pneumothorax . A small left pleural effusion has improved from when the CT was performed , ___ at 16 :08 , which was new from the radiograph taken 2 hours before that , at 13 :55 .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Severe chronic cardiomegaly and small , improving left pleural effusion .