Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Bibasilar , right greater than left opacities are again seen , similar compared to the prior study from ___ . On CT from ___ , there is seen to be a large hiatal hernia extending into the right lower hemithorax with adjacent atelectasis . Suggestion of air - fluid level seen in the right lung base likely relates to this large hiatal hernia . Stable medial left base patchy opacity most likely relates to atelectasis / scarring . Cardiac and mediastinal silhouette is grossly stable as compared to ___ . Slight blunting of posterior costophrenic angle makes a trace pleural effusion difficult to exclude . Evidence of prior vertebroplasty is again seen in the lower thoracic spine with a vertebral body just inferior to this compressed appears stable .
    OUTPUT:
    
Low lung volumes . Right base opacity with air - fluid level likely corresponds to known large hiatal hernia seen on prior imaging with adjacent atelectasis . Blunting of posterior costophrenic angle makes trace effusion difficult to exclude .