Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate clear lungs bilaterally . Streaky opacity at the left lung base is sequela of atelectasis . There is no pneumothorax , pleural effusion , or pulmonary edema . Cardiomediastinal and hilar contours are within normal limits . There is no air under the right hemidiaphragm .
    OUTPUT:
    
No evidence of pneumonia .