Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Elevation of the right hemidiaphragm is chronic . The lungs are clear without focal opacity , overt pulmonary edema , pleural effusion or pneumothorax . The cardiac and mediastinal contours are stable . No acute osseous abnormality .
    OUTPUT:
    
Clear lungs . No acute osseous abnormality .