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 mediastinal clips are again noted . There is mild bibasilar linear plate - like atelectasis without convincing sign of pneumonia , or CHF . No large effusions or pneumothorax is seen . The thoracic aorta is densely calcified . The heart is within normal limits in size . The bony structures are intact . No free air below the right hemidiaphragm . Degenerative changes are partially imaged at both shoulders .
    OUTPUT:
    
Mild bibasilar atelectasis . Densely calcified thoracic aorta . No convincing signs of pneumonia or other acute intrathoracic process .