Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal cardiomediastinal silhouette . Linear opacities at the left apex may represent increasing radiation fibrosis . No pneumonia . No pulmonary edema . No pleural effusion . No pneumothorax .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Increasing linear opacities at the left apex , which may be due to radiation fibrosis