Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate clear lungs bilaterally . Cardiomediastinal and hilar contours are within normal limits . There is no focal opacity convincing for pneumonia . There is no pneumothorax , pleural effusion , or evidence of pulmonary edema . No air under the right hemidiaphragm is identified .
    OUTPUT:
    
No opacity convincing for pneumonia .