Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable chest radiograph demonstrates minimally improved aeration of the previously completely collapsed left lower lobe . Remainder of the left and right lungs are clear . No pneumothorax is evident . A small left pleural effusion is likely . A right - sided PICC line terminates in the distal SVC .
    OUTPUT:
    
Persistent though improved left lower lobe collapse with a small left pleural effusion .