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