Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes noted with crowding of the bronchovascular markings . There is no overt pulmonary edema . There is streaky right basilar opacity with more focal consolidation at the left lung base in the retrocardiac region . There is no pneumothorax nor pleural effusion , although the extreme costophrenic angles are excluded from the field of view . Cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Bibasilar opacities likely representing at least in part atelectasis noting that focal infection , particularly at the left lung base can not be excluded and clinical correlation will be necessary .