Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The cardiac silhouette size is unchanged , and borderline enlarged . The aortic knob is calcified . The mediastinal and hilar contours are unremarkable otherwise . There is no pulmonary edema . Streaky opacities in the lung bases likely reflect atelectasis . No pleural effusion or pneumothorax is detected . There are multilevel degenerative changes in the thoracic spine . Numerous clips are demonstrated within the left upper abdomen . No free air is identified under the diaphragms .
    OUTPUT:
    
Bibasilar streaky opacities likely reflective of atelectasis .