Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are relatively unchanged , with the heart size appearing top normal . There is mild pulmonary edema , minimally worse when compared to the prior study . Moderate size right and small left pleural effusions are relatively unchanged . There are patchy bibasilar airspace opacities , likely reflective of atelectasis though infection can not be completely excluded . No pneumothorax is identified . Thoracic posterior spinal fusion hardware accomplished by two posterior rods and pedicle screws is unchanged . There are multiple clips also demonstrated within the mid back .
    OUTPUT:
    
Mild congestive heart failure , with moderate size right and small left pleural effusion . Bibasilar airspace opacities likely reflect atelectasis though infection is not completely excluded .