Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There are bibasilar opacities which could be secondary to atelectasis given the low lung volumes on the current exam . Rounded opacity in the posterior left costophrenic sulcus is compatible with a rounded opacity on prior chest CT . Subcentimeter nodular opacity seen in the left mid lung and vaguely identified on prior chest x-ray without clear parenchymal abnormality on interval CT scan . Superiorly the lungs are otherwise clear . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormality identified . Multiple air - fluid levels seen throughout nondilated loops of small bowel .
    OUTPUT:
    
Bibasilar opacities suggestive of atelectasis given relatively lower lung volumes , noting infection can not be excluded . Rounded opacity in the left posterior costophrenic sulcus better characterized on prior exam . Additional nodule projecting over the left midlung was present which is more conspicuous on today 's chest x-ray noting there was no parenchymal abnormality on interval CT scan . Attention on followup of this is suggested . Air-fluid levels identified in the small bowel in the upper abdomen for which clinical correlation is suggested .