Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A hemodialysis catheter ends in the right atrium , and is unchanged in position . Again seen is opacification involving the left lung base , which represents a small to moderate pleural effusion and associated compressive atelectasis , unchanged since ___ . Since prior , there has been increased opacification at the right lung base , likely representing atelectasis . There is no pneumothorax . A right - sided scoliosis is again noted . Calcifications are noted within a tortuous aorta .
    OUTPUT:
    
1 . Unchanged moderate left pleural effusion with associated compressive atelectasis . 2 . Increased opacification at the right lung base , which likely represents atelectasis .