Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Midline sternotomy wires and prosthetic cardiac valve are again noted . The lungs appear clear . There is no pleural effusion or pneumothorax . Kyphoscoliosis somewhat limits evaluation . There is tracheobronchial tree calcification . No pneumothorax or pleural effusion is seen . Old right rib deformities are noted . Otherwise , the imaged bony structures appear unremarkable .
    OUTPUT:
    
No acute findings in the chest .