Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 07 :44 is submitted .
    OUTPUT:
    
A dual lead left - sided pacer remains in place with its leads terminating over the expected location of the right atrium and right ventricle , respectively . Overall cardiac mediastinal contours are stable . There continues to be bibasilar opacity which is likely not significantly changed and more likely represents partial lower lobe atelectasis given the presence of stable small pleural effusions , although pneumonia or aspiration can not be entirely excluded . No evidence of pulmonary edema . No pneumothorax .