Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate an unchanged cardiomediastinal silhouette , with the heart top normal in size . Diffusely increased opacity of the lungs consistent with the patient 's known interstitial disease is less apparent and there is no focal opacity , pleural effusion , or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia .