Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prior right central venous catheter is no longer visualized . Lung volumes are low . Linear opacity in the right midlung is suggestive of atelectasis . Additional left basilar , retrocardiac opacity is also likely atelectasis . Cardiomediastinal silhouette is stable given lower lung volumes . No acute osseous abnormality . Anterior compression deformity of a mid thoracic vertebral body is unchanged . IVC filter is partially visualized .
    OUTPUT:
    
Left basilar opacity is likely atelectasis in setting of low lung volumes , however infection is not entirely excluded .