Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP single view of the chest shows reduced lung volume but without consolidation . New left retrocardiac opacification is likely due to atelectasis . No pleural effusion or pneumothorax . Heart size is still moderately enlarged . IJ catheter is unchanged with tip ending in right atrium .
    OUTPUT:
    
New left base atelectasis . No pleural effusion .