Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Moderate size hiatal hernia with air - fluid level is present . Aortic knob is calcified . Mediastinal and hilar contours are unremarkable otherwise . Lungs are clear . No pleural effusion , focal consolidation or pneumothorax is seen . There are minimal degenerative changes in the lower thoracic spine .
    OUTPUT:
    
Moderate size hiatal hernia . No acute cardiopulmonary abnormality .