Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal , and hilar contours appear unchanged . There are patchy basilar opacities with similar distribution which suggests atelectasis associated with low lung volumes . The lateral view suggests patchy posterior left lower lobe opacity and flattening of hemidiaphragms . Although it is difficult to exclude that a posterior opacity may represent an effusion , it probably represents atelectasis . An ultrasound from the prior day showed no evidence for fluid .
    OUTPUT:
    
Basilar opacities , not specific but suggestive of atelectasis . If pneumonia is a clinical concern , then a short - term followup radiographs , preferably with standard PA and lateral technique , could be considered . If there is clinical concern that a pleural effusion may have developed since the ultrasound , then potentially a decubitus view might be useful if clinically indicated .