Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs remain hyperinflated . The cardiac and mediastinal silhouettes are stable . Patchy right base opacity has been present over multiple prior studies and may be chronic , underlying aspiration or infection is difficult to entirely exclude . The left lung is grossly clear . There is no pleural effusion or pneumothorax . The bones are diffusely osteopenic .
    OUTPUT:
    
Hyperinflated lungs . Right base opacity ; a right base opacity has been present over multiple prior studies , however , underlying aspiration or infection is difficult to entirely exclude .