Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The hilar contours are within normal limits . The cardiac silhouette is somewhat obscured by a moderate to large fluid - filled hiatal hernia . There is elevation of the right hemidiaphragm which is largely stable from the prior examination . Lung volumes are somewhat low . Opacity at the base of the left lung is likely compressive atelectasis related to the patient 's hernia however underlying infection should be considered . No pneumothorax . There is marked levoscliosis of the thoracic spine .
    OUTPUT:
    
1 . Moderate to large hiatal hernia and adjacent pulmonary opacity which may reflect compressive atelectasis or infection . 2 . Persistently elevated right hemidiaphragm . No pneumothorax .