Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Tracheostomy tube projects over the superior mediastinum . Sternotomy wires , fragmented , again seen with clips in the superior mediastinum . Lungs are clear . No signs of pneumonia or edema . No large effusion or pneumothorax . Cardiomediastinal silhouette appears normal . Bony structures are intact .
    OUTPUT:
    
No evidence of pneumonia or other acute intrathoracic process .