Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left hemidiaphragm is elevated . There are relatively low lung volumes and mild right base atelectasis . Right basilar opacity projecting over the medial right lung base with possible air bronchograms , underlying pneumonia or aspiration not excluded . No large pleural effusion or pneumothorax seen . The mediastinum is somewhat shifted to the right more so than patient position , this could relate to the elevated left diaphragm .
    OUTPUT:
    
Elevated left hemidiaphragm and bibasilar atelectasis . Additional focus of opacity in the medial right lung base with possible air bronchograms could be due to infection or aspiration .