Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is a catheter traversing the right hemithorax which is unchanged and may represent a VP shunt catheter . There is left basilar atelectasis with mild elevation of the left hemidiaphragm , unchanged . No new opacity to suggest pneumonia . Midline sternotomy wires and mediastinal clips are again noted . No large effusion or pneumothorax . The heart size appears grossly stable and within normal limits . The mediastinal contour is normal . The imaged osseous structures appear intact . A calcific density is again seen projecting inferior to the right coracoid process .
    OUTPUT:
    
No convincing signs of pneumonia .