Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is diffuse interstitial edema involving the right lung , which appears unchanged from the prior study of ___ . There is a small , stable left pleural effusion . The heart is enlarged . There is a linear density at the left lung base , which has been stable since ___ and likely represents atelectasis versus scarring . There is a lobulated contour to the right hemidiaphragm , which is stable since ___ . There is no focal consolidation or pneumothorax . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
1 . Diffuse interstitial edema of the right lung , unchanged dating back to ___ . 2 . Small stable left pleural effusion .