Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is diffuse interstitial parenchymal scarring which is overall improved compared to ___ chest radiograph . Both lungs are shrunken in size resulting in exaggerated heart size . The heart size is normal . There is no pulmonary vascular congestion or pulmonary edema . There is no pneumothorax or pleural effusion seen . Mediastinal clips are visualized on lateral view
    OUTPUT:
    
1 . When compared to ___ chest radiograph , there is mild improvement of diffuse interstitial scarring . No evidence of pleural effusions or pulmonary edema noted .