Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . There is no pleural effusion . Cardiomediastinal and hilar contours are within normal limits . There is no pneumothorax . Patient is status post bilateral shoulder arthroplasties .
    OUTPUT:
    
Clear lungs without acute intrathoracic abnormality .