Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart , mediastinal and hilar contours are within normal limits and without change . Band - like areas of opacity have improved in the left lower lobe and are worse in the right lower lobe , with additional more confluent opacity which has newly developed in the right lower lobe posteriorly . Small bilateral pleural effusions are present , right greater than left . No pneumothorax . Postoperative changes are present within the lower thoracic and upper lumbar spine , and note is also made of soft tissue gas and air-fluid level in the posterior chest wall , consistent with recent surgery .
    OUTPUT:
    
1 . Bibasilar atelectasis . Coexisting aspiration or pneumonia is possible in posterior segment right lower lobe . 2 . Small bilateral pleural effusions .