Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires and mediastinal clips are constant . Lung volumes are low . No pleural effusion , pneumothorax or focal airspace consolidation . Heart is top normal in size but unchanged . Mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
Low lung volumes without an acute cardiopulmonary process .