Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate hyperexpansion with flattening of the hemidiaphragms . The lungs are now clear . There is no focal consolidation , pleural effusion , or pneumothorax . The heart size is top normal . The cardiac , hilar , mediastinal contours are normal .
    OUTPUT:
    
No acute cardiopulmonary process .