Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is heterogeneous opacity in the right lung adjacent to the right heart border which may represent right lower lung zone atelectasis or pneumonia . Cardiomediastinal silhouette is stable and within normal limits . Tracheostomy with endotracheal tube is seen unchanged in position terminating no less than 2 cm from the carina . Right catheter sheath is seen terminating within the low SVC . There is no pneumothorax .
    OUTPUT:
    
Right lower lung opacity which may represent either atelectasis or pneumonia in the appropriate clinical setting .