Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffuse hazy opacification of both lung fields is likely related to soft tissue attenuation or underpenetration on technique . Retrocardiac opacification with streaky opacities in lower lobes on the lateral radiograph most likely reflects atelectasis in the setting as decreased lung volumes . However , in the appropriate clinical context , a superimposed infection is not entirely excluded . There is no overt pulmonary edema . No pleural effusion or pneumothorax is present . The cardiomediastinal silhouette is within normal limits allowing for decreased lung volumes . The trachea is midline .
    OUTPUT:
    
Mild retrocardiac opacification in the setting of low lung volumes most likely represents atelectasis . In the appropriate clinical context , superimposed infection is not entirely excluded .