Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left prepectoral dual lead pacemaker in situ . NG tube with the lead tips in the right atrium right ventricle . Persistent left - sided pleural effusion with associated blunting of the costophrenic angle . Small right - sided pleural effusion . There is persistent opacification of the left lower lobe which has the appearance of rounded atelectasis on previous CT done ___ .
    OUTPUT:
    
The left lower lobe opacity is seen fluctuating in density over serial radiographs and this most likely represents persistent rounded atelectasis in the left lower lobe with varying amounts of pleural effusion .