Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were performed . The lungs are hyperexpanded . There is no pleural effusion , pneumothorax or focal airspace consolidation . Atelectasis is seen at the left lung base . The cardiac and mediastinal contours are normal . Calcifications are seen within the aortic arch . There are no acute osseous abnormalities appreciated . Sternotomy wires and mediastinal clips are redemonstrated .
    OUTPUT:
    
No acute cardiopulmonary process .