Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There are low lung volumes that accentuate the bronchovascular markings . There is likely bibasilar atelectasis given the low lung volumes , although underlying aspiration is not entirely excluded . Consider repeat PA and lateral views with improved inspiratory effort when the patient is able for better assessment of the lung bases . No large pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Low lung volumes . Subtle bibasilar opacities likely due to atelectasis in the setting of low lung volumes ; however , consider dedicated PA and lateral views with better inspiratory effort when patient able , for better evaluation of the lung bases .