Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes with crowding of the bronchovascular structures . There is a hazy opacity in the right lung base , unchanged from prior exam , which likely represents atelectasis with probable pleural effusion . The cardiomediastinal silhouette is mildly enlarged , stable from prior exam . There is no pneumothorax or large pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process . Persistent right base atelectasis with probable right pleural effusion .