Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate clear lungs bilaterally . Linear opacities at the bases bilaterally , left greater than right , likely reflect atelectasis . There is no pneumothorax or pleural effusion . Cardiomediastinal and hilar contours are within normal limits . No evidence of pulmonary edema . No air under the right hemidiaphragm .
    OUTPUT:
    
Atelectasis at the bases without evidence of acute intrathoracic abnormality .