Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . The lung volumes are low . Opacities are present at both lung bases but if anything somewhat more expanded compared to the prior studies at the left lung base . There is a more coalescent band - like opacity at the right lung base but again overall fairly similar in extent relative to pre-existing opacification at the right lung base . There are no clearly defined pleural effusions although small very small ones would be difficult to exclude .
    OUTPUT:
    
Findings suggesting interstitial lung disease and areas of atelectasis or scarring at the lung bases . Superimposed infection is not excluded but might not be the case noting that there was an overall fairly similar extent of basilar opacities on prior examinations . Chest CT may be helpful to evaluate further if clinically indicated in addition to correlation with interval history .