Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to prior chest x-ray from ___ , the cardiomediastinal silhouettes are stable . Central bronchovascular and diffuse interstitial prominence is compatible with mild to moderate pulmonary edema on a background of underlying interstitial lung disease . There is biapical pleuroparenchymal scarring . A tortuous thoracic aorta is again noted . The trachea is midline . There is a small right pleural effusion . There is no left pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Mild to moderate pulmonary edema on a background of interstitial lung disease . 2 . Small right pleural effusion .