Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates in the low SVC . A left central venous catheter tip terminates in the upper SVC . Tracheostomy tube tip terminates approximately 3 .3 cm from the carina . Lung volumes remain low . Heart size is normal . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . There is retrocardiac opacity which could reflect atelectasis , but infection is not excluded . No large pleural effusion or pneumothorax is seen on this supine exam . Mild S - shaped scoliosis is re - demonstrated within the thoracolumbar spine .
    OUTPUT:
    
1 . Tracheostomy tube tip is in standard position . 2 . Persistent left basilar opacity which may reflect atelectasis but infection is not excluded in the correct clinical setting .