Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright AP view of the chest demonstrates interval removal of a dual - lumen hemodialysis catheter since the prior study . The lungs are well expanded , with a linear area of atelectasis in the left lower lung , but no focal consolidation , pleural effusion , pneumothorax , or overt pulmonary edema . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .