Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac and mediastinal silhouettes are stable . Perihilar opacities are grossly stable . This patient with known chronic interstitial lung disease . Main pulmonary artery remains dilated . No pleural effusion or pneumothorax seen .
    OUTPUT:
    
Cardiac and mediastinal silhouettes are stable . Perihilar opacities are grossly stable . This patient with known chronic interstitial lung disease . Main pulmonary artery remains dilated . No pleural effusion or pneumothorax seen .