Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Left chest wall Port - A - Cath is again noted with catheter tip in the region of the lower SVC . Mild bibasilar atelectasis is noted . Otherwise lungs are clear . In this patient with provided history of lung cancer , no discrete nodule or mass is identified within either lung . Cardiomediastinal silhouette appears normal . Bony structures appear intact . Vertebroplasty changes in the upper lumbar spine noted . No free air below the right hemidiaphragm .
    OUTPUT:
    
Mild bibasilar atelectasis . Port - A - Cath in appropriate position . Please refer to subsequent CT abdomen pelvis for further details .