Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Cardiac silhouette is upper limits normal in size accounting for this factor . Low lung volumes accentuate the bronchovascular structures . There is no evidence of pulmonary edema . Bibasilar retrocardiac opacities are present with some associated volume loss , particularly in the right lower lobe with inferior displacement of right hilum and right major fissure . These findings have slightly progressed since the prior radiograph . No definite pleural effusion .
    OUTPUT:
    
1 . No evidence of pulmonary edema . 2 . Bibasilar atelectasis , right greater than left .