Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Cardiomediastinal and hilar contours are within normal limits . There is no evidence of pleural effusion , pulmonary edema , or pneumothorax . Imaged upper abdomen is unremarkable .
    OUTPUT:
    
No opacity convincing for pneumonia .