Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate increased diffuse interstitial lung markings , consistent with the patient 's known diagnosis of interstitial pulmonary fibrosis . The cardiomediastinal and hilar contours are unchanged . There is no pneumothorax or pleural effusion . .
    OUTPUT:
    
Increased diffuse interstitial lung markings consistent with the patient 's known diagnosis of interstitial pulmonary fibrosis . No superimposed focal pneumonia .