Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are noted . Linear opacities at the bases may be secondary to atelectasis . There is no effusion or vascular congestion . The cardiomediastinal silhouette is within normal limits . Contrast seen in the right renal pelvis from recent CT scan . Height loss of a lower thoracic vertebral body is unchanged from prior exam .
    OUTPUT:
    
Low lung volumes with linear bibasilar opacities most likely atelectasis .