Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs are provided . Lung volumes are low . There is crowding of the pulmonary vasculature in the upper lung zones . Patchy opacities at the bases may represent atelectasis ; however , underlying infectious process can not be excluded . The previously seen left lower lobe opacity is less conspicuous on the current study . Cardiomediastinal silhouette is unremarkable allowing for the AP view . There are no concerning osseous lesions .
    OUTPUT:
    
Low lung volumes with bibasilar opacities which may represent atelectasis ; however , underlying infectious shows process can not be excluded .