Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low bibasilar opacities which likely represent atelectasis , however could represent early infection in the appropriate clinical setting . There is no pleural effusion , or pneumothorax . Heart size and mediastinal contours are normal .
    OUTPUT:
    
Bibasilar opacities likely reflecting atelectasis in the setting of low lung volumes , however infection could be a possibility in the appropriate clinical setting .