Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are relatively low . Streaky opacities at the left lung base likely represent atelectasis . No focal consolidation concerning for pneumonia , significant pleural effusion , or pneumothorax is detected . The pulmonary vasculature is not engorged . The cardiac silhouette appears top normal in size in the setting of low lung volumes . The mediastinal contours are within normal limits . The trachea is midline . There is no evidence of free air beneath the right hemidiaphragm .
    OUTPUT:
    
Streaky opacities at the left lung base likely represent atelectasis .