Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate median sternotomy wires which appear intact . Surgical ___ project over the left cardiac border . Lungs are clear with linear opacity at the left lung base laterally which corresponds to subsegmental atelectasis as better appreciated on CT torso performed ___ . There is no pleural effusion , pneumothorax , or evidence of pulmonary edema . No air under the right hemidiaphragm is present .
    OUTPUT:
    
No evidence of pneumonia . Subsegmental atelectasis of the lingula best appreciated on CT torso performed ___ at outside hospital .