Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Tracheostomy tube again noted projecting over the superior mediastinum . There is a left IJ access central venous catheter with its tip terminating in the low SVC , unchanged . There is persistent elevation of the right hemidiaphragm with right basal atelectasis as on prior . Lungs are otherwise clear . No convincing signs of pneumonia . Cardiomediastinal silhouette is unchanged . Bony structures are intact .
    OUTPUT:
    
No convincing evidence for pneumonia .